update bullet so it actually works

Moved the addSourceDirectory for physics/Bullet into the Engine/Source/CMakeLists.txt file that way it can actually appear where we expect it to in the solution explorer.

Engine/lib/bullet/examples/OpenGLWindow/Shaders/pointsVS.glsl

@@ -0,0 +1,15 @@
+#version 150   
+
+uniform mat4 ModelViewMatrix;
+uniform mat4 ProjectionMatrix;
+uniform vec4 colour;
+in vec4 position;
+in vec4 colourIn;
+out vec4 colourV;
+
+void main (void)
+{
+		colourV = (colour[3] == -1) ? colourIn : colour;
+		gl_Position = ProjectionMatrix * ModelViewMatrix * position;
+		
+}