Done alot of work, including FreeImage and models

- Finally managed to get all FreeImage code to work and got rid of all
the old SOIL code
- Created a /bin/ directory to hold all includes instead of having them
spread all over the windows installation
- Models are now supported using the AssImp library to import a huge
variety of model formats
- Some shader work so the primary ones now comply to the GLSL core
version 3.3 completely
- Converted project to visual studio 2012 instead
- Started work on some kind of Stencil shadows