Add error management in sndfile.
Merge
Adding functionnality in the Keyboard Event.
Adjustment of exemples for the {GAME_SURFACE}.make_with_bits_per_pixel.
Major modification in the Core Library
Modifying Audio Library to comform to programming standard.
Standardisation of the {AUDIO_CONTROLLER} class of the audio_lib library.
Standardisation of the audio libraries.
Finalization of the standardisation of the libraries.
Remove console application in the effect exemple.
Update README for EiffelStudio72 in Mac.
Bugs in the keyboard-text examples compilations.
Adding UNICODE support.
Replace Tick base Event method by iterations per second method.
Trying to remove C compilation bug on when MS SDK is on the PATH.
Another tentative to correct compilation error on Windows.