Removed SDL_image code
Added SDL_OPENGL to the SetVideoMode flags
Removed the SDL_Surface argument from all Gui*->draw()-Methods
Removed the surface argument from all remaining draw(SDL_Surface*)'s
Swap the OpenGL buffers rather than the SDL ones
Removed the width- and height-members from SdlWindow
Added an initGl method to SdlWindow
Moved out-of-place code
Removed the getter for the SDL_Surface*
Use setTitle so set the window title
Added missing include of gl.h
Added simple framerate limiting
Fixed a code style issue
Removed the table argument from getTableField
Revert "Removed the table argument from getTableField"

This reverts commit e2141e5b87f054596c03c7707b6acf3f37ed9265.
Print the framerate