Improve code formatting and update to 2.0

The scripts were streamlined using more or less the following conventions:
 - space after a comma in lists of arguments
 - space around weak operators (+, -), no space around strong operators (*, /)
 - space after a comment start (#)
 - removed trailing spaces or tabs, apart from those that delimit the function indentation level (those could be removed too but since they are added automatically by the editor when typing code, keeping them for now)
 - function blocks separate by two newlines

The scene files were resaved with the (current) 2.0 format, and some scenes that were in XML format were converted to SCN, to be consistent across all demos.

8 files changed, 1 insertions, 180 deletions

diff --git a/demos/3d/sat_test/box.scn b/demos/3d/sat_test/box.scn
index 8b02826ea7..f9c15839a2 100644
--- a/demos/3d/sat_test/box.scn
+++ b/demos/3d/sat_test/box.scn
diff --git a/demos/3d/sat_test/capsule.scn b/demos/3d/sat_test/capsule.scn
index a4fe2b2b3f..db8ff43116 100644
--- a/demos/3d/sat_test/capsule.scn
+++ b/demos/3d/sat_test/capsule.scn
diff --git a/demos/3d/sat_test/convex.scn b/demos/3d/sat_test/convex.scn
index 5f62beccaf..93e05338eb 100644
--- a/demos/3d/sat_test/convex.scn
+++ b/demos/3d/sat_test/convex.scn
diff --git a/demos/3d/sat_test/engine.cfg b/demos/3d/sat_test/engine.cfg
index 82c688635d..e21c9b1eff 100644
--- a/demos/3d/sat_test/engine.cfg
+++ b/demos/3d/sat_test/engine.cfg
@@ -1,5 +1,5 @@
 [application]
 
 name="SAT Collision Test"
-main_scene="res://sat_test.xml"
+main_scene="res://sat_test.scn"
 icon="res://icon.png"
diff --git a/demos/3d/sat_test/sat_test.scn b/demos/3d/sat_test/sat_test.scn
new file mode 100644
index 0000000000..0b25431202
--- /dev/null
+++ b/demos/3d/sat_test/sat_test.scn
diff --git a/demos/3d/sat_test/sat_test.xml b/demos/3d/sat_test/sat_test.xml
deleted file mode 100644
index f11dec3292..0000000000
--- a/demos/3d/sat_test/sat_test.xml
+++ /dev/null
@@ -1,179 +0,0 @@
-<?xml version="1.0" encoding="UTF-8" ?>
-<resource_file type="PackedScene" subresource_count="5" version="0.99" version_name="Godot Engine v0.99.3735-pre-beta">
-	<ext_resource path="res://box.*" type="PackedScene"></ext_resource>
-	<ext_resource path="res://sphere.*" type="PackedScene"></ext_resource>
-	<ext_resource path="res://capsule.*" type="PackedScene"></ext_resource>
-	<ext_resource path="res://convex.*" type="PackedScene"></ext_resource>
-	<main_resource>
-		<dictionary name="_bundled" shared="false">
-			<string> "names" </string>
-			<string_array  len="30">
-				<string> "Node" </string>
-				<string> "__meta__" </string>
-				<string> "sphere" </string>
-				<string> "Spatial" </string>
-				<string> "transform/local" </string>
-				<string> "box" </string>
-				<string> "convex" </string>
-				<string> "Camera" </string>
-				<string> "projection" </string>
-				<string> "fov" </string>
-				<string> "near" </string>
-				<string> "far" </string>
-				<string> "vaspect" </string>
-				<string> "current" </string>
-				<string> "visible_layers" </string>
-				<string> "environment" </string>
-				<string> "OmniLight" </string>
-				<string> "layers" </string>
-				<string> "params/energy" </string>
-				<string> "colors/ambient" </string>
-				<string> "colors/diffuse" </string>
-				<string> "colors/specular" </string>
-				<string> "shadow/shadow" </string>
-				<string> "shadow/darkening" </string>
-				<string> "shadow/z_offset" </string>
-				<string> "shadow/z_slope_scale" </string>
-				<string> "projector" </string>
-				<string> "operator" </string>
-				<string> "params/radius" </string>
-				<string> "params/attenuation" </string>
-			</string_array>
-			<string> "version" </string>
-			<int> 1 </int>
-			<string> "conn_count" </string>
-			<int> 0 </int>
-			<string> "node_count" </string>
-			<int> 7 </int>
-			<string> "variants" </string>
-			<array  len="26" shared="false">
-				<dictionary  shared="false">
-					<string> "__editor_plugin_states__" </string>
-					<dictionary  shared="false">
-						<string> "2D" </string>
-						<dictionary  shared="false">
-							<string> "zoom" </string>
-							<real> 1 </real>
-							<string> "ofs" </string>
-							<vector2> 1, 1 </vector2>
-						</dictionary>
-						<string> "3D" </string>
-						<dictionary  shared="false">
-							<string> "zfar" </string>
-							<real> 500 </real>
-							<string> "fov" </string>
-							<real> 400 </real>
-							<string> "viewports" </string>
-							<array  len="4" shared="false">
-								<dictionary  shared="false">
-									<string> "distance" </string>
-									<real> 34.508423 </real>
-									<string> "x_rot" </string>
-									<real> 0.7 </real>
-									<string> "y_rot" </string>
-									<real> 1.262503 </real>
-									<string> "use_orthogonal" </string>
-									<bool> False </bool>
-									<string> "use_environment" </string>
-									<bool> False </bool>
-									<string> "pos" </string>
-									<vector3> 13.3659, 3.22136, 2.27417 </vector3>
-								</dictionary>
-								<dictionary  shared="false">
-									<string> "distance" </string>
-									<real> 4 </real>
-									<string> "x_rot" </string>
-									<real> 0 </real>
-									<string> "y_rot" </string>
-									<real> 0 </real>
-									<string> "use_orthogonal" </string>
-									<bool> False </bool>
-									<string> "use_environment" </string>
-									<bool> False </bool>
-									<string> "pos" </string>
-									<vector3> 0, 0, 0 </vector3>
-								</dictionary>
-								<dictionary  shared="false">
-									<string> "distance" </string>
-									<real> 4 </real>
-									<string> "x_rot" </string>
-									<real> 0 </real>
-									<string> "y_rot" </string>
-									<real> 0 </real>
-									<string> "use_orthogonal" </string>
-									<bool> False </bool>
-									<string> "use_environment" </string>
-									<bool> False </bool>
-									<string> "pos" </string>
-									<vector3> 0, 0, 0 </vector3>
-								</dictionary>
-								<dictionary  shared="false">
-									<string> "distance" </string>
-									<real> 4 </real>
-									<string> "x_rot" </string>
-									<real> 0 </real>
-									<string> "y_rot" </string>
-									<real> 0 </real>
-									<string> "use_orthogonal" </string>
-									<bool> False </bool>
-									<string> "use_environment" </string>
-									<bool> False </bool>
-									<string> "pos" </string>
-									<vector3> 0, 0, 0 </vector3>
-								</dictionary>
-							</array>
-							<string> "viewport_mode" </string>
-							<int> 1 </int>
-							<string> "default_light" </string>
-							<bool> False </bool>
-							<string> "show_grid" </string>
-							<bool> True </bool>
-							<string> "show_origin" </string>
-							<bool> True </bool>
-							<string> "znear" </string>
-							<real> 0.1 </real>
-						</dictionary>
-					</dictionary>
-					<string> "__editor_run_settings__" </string>
-					<dictionary  shared="false">
-						<string> "custom_args" </string>
-						<string> "-l $scene" </string>
-						<string> "run_mode" </string>
-						<int> 0 </int>
-					</dictionary>
-					<string> "__editor_plugin_screen__" </string>
-					<string> "3D" </string>
-				</dictionary>
-				<resource  resource_type="PackedScene" path="res://sphere.*">  </resource>
-				<transform> 1, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, -2.93877 </transform>
-				<resource  resource_type="PackedScene" path="res://box.*">  </resource>
-				<transform> 1, 0, 0, 0, 1, 0, 0, 0, 1, 13.5356, 0, -3.40082 </transform>
-				<resource  resource_type="PackedScene" path="res://convex.*">  </resource>
-				<transform> 1, 0, 0, 0, 1, 0, 0, 0, 1, 22.8626, 0, -2.50073 </transform>
-				<resource  resource_type="PackedScene" path="res://capsule.*">  </resource>
-				<transform> 1, 0, 0, 0, 1, 0, 0, 0, 1, 28.4061, 0, -2.76809 </transform>
-				<transform> 1, 0, 0, 0, 0.819152, 0.573576, 0, -0.573576, 0.819152, 14.482, 11.1225, 20.5858 </transform>
-				<int> 0 </int>
-				<real> 60 </real>
-				<real> 0.1 </real>
-				<real> 100 </real>
-				<bool> False </bool>
-				<int> -1 </int>
-				<resource name=""></resource>				<transform> 1, 0, 0, 0, 1, 0, 0, 0, 1, 66.4797, 0, 10.4696 </transform>
-				<int> 1 </int>
-				<real> 1.5 </real>
-				<color> 0.355828, 0.346354, 0.329995, 1 </color>
-				<color> 1, 1, 1, 1 </color>
-				<real> 0 </real>
-				<real> 0.05 </real>
-				<real> 500 </real>
-				<real> 0.535887 </real>
-			</array>
-			<string> "nodes" </string>
-			<int_array  len="105"> 				-1, -1, 0, 0, -1, 1, 1, 0, 0, 0, 0, 3, 2, 1, 1, 4, 2, 0, 0, 0, 3, 5, 3, 1, 4, 4, 0, 0, 0, 3, 6, 5, 1, 4, 6, 0, 0, 0, 3, 3, 7, 1, 4, 8, 0, 0, 0, 7, 7, -1, 9, 4, 9, 8, 10, 9, 11, 10, 12, 11, 13, 12, 14, 13, 14, 14, 15, 15, 16, 0, 0, 0, 16, 16, -1, 14, 4, 17, 17, 18, 18, 19, 19, 20, 20, 21, 21, 21, 22, 14, 23, 22, 24, 23, 25, 22, 26, 16, 27, 10, 28, 24, 29, 25, 0 </int_array>
-			<string> "conns" </string>
-			<int_array  len="0"> 				 </int_array>
-		</dictionary>
-
-	</main_resource>
-</resource_file>
\ No newline at end of file
diff --git a/demos/3d/sat_test/shapes.scn b/demos/3d/sat_test/shapes.scn
index 584237b89d..bf10be0a59 100644
--- a/demos/3d/sat_test/shapes.scn
+++ b/demos/3d/sat_test/shapes.scn
diff --git a/demos/3d/sat_test/sphere.scn b/demos/3d/sat_test/sphere.scn
index dd49c914b3..e40c3bd42d 100644
--- a/demos/3d/sat_test/sphere.scn
+++ b/demos/3d/sat_test/sphere.scn