Added shaders and tests.
Shading made easy... :)
Removed unused shader import in test implementation.
Fixed native library mess. Now they are loaded from the jar.
Added the possibility and requirement to unload libraries.
Removed old LibraryLoader, whereas it was a complete mess and would not
work anyway.

Changed GameSettings: Removed custom libraries added MemoryConfiguration
to load and save data to a config file.
Fixed some TODOs.
Commented FileConfiguration and MemoryConfiguration as well as
NativeLoader.
Merge remote-tracking branch 'origin/master'