Massive overhaul of headers: (part 2)
- Hopefully removed unnecessary includes across the headers
- Added CResource.cpp, CTimer.cpp, IconSurface.cpp, MasterFile.cpp, cInterfaceObject.cpp and cTextItem.cpp to project and moved the code from headers to source files
- Few code reading polishing again

Signed-off-by: Jan Nemecek <Nemecek.Jan@seznam.cz>