Update Ponykart++

- Started implementing camera classes
- Started implementing input classes (OIS)
- Created Settings.h from Ponykart's Settings.gsettings. Access through
Settings::mysetting
- Commented out the missing OgreBullet refences for the moment
- Fixed broken shaders that crashed GL
- Implemented various functions (required by the new classes) in
existing classes.
- Delete LKernelStartup.cpp, since the main() was moved to Core/main.cpp