SCons updates: (All done by jesterKing)

* Windows .exe file now includes the blender icon.
* Builds with game engine on Windows only.
  I tried building the game engine on Linux, but I get weird errors when
  building with ode. There's a dirty #include path in
  Physics/BlOde/OdePhysicsEnvironment.cpp (../ode/src/joint.h). gcc doesn't
  like this somehow.
* Other platforms need to add a couple of flags to the SConstruct:
  use_sumo, use_ode, solid_include and ode_include

source/gameengine/Rasterizer/RAS_OpenGLRasterizer/SConscript

@@ -0,0 +1,22 @@
+ras_openglrasterizer_env = Environment()
+
+# Import the C flags set in the SConstruct file
+Import ('cflags')
+Import ('cxxflags')
+Import ('defines')
+ras_openglrasterizer_env.Append (CCFLAGS = cflags)
+ras_openglrasterizer_env.Append (CXXFLAGS = cxxflags)
+ras_openglrasterizer_env.Append (CPPDEFINES = defines)
+
+source_files = ['RAS_CheckVertexArrays.cpp',
+                'RAS_OpenGLRasterizer.cpp',
+                'RAS_VAOpenGLRasterizer.cpp']
+
+ras_openglrasterizer_env.Append (CPPPATH=['.',
+                                          '#source/kernel/gen_system',
+                                          '#intern/string',
+                                          '#intern/moto/include',
+                                          '#source/gameengine/Rasterizer'
+                                         ])
+
+ras_openglrasterizer_env.Library (target='#/lib/RAS_OpenGLRasterizer', source=source_files)