- Addition of a class diagram in the documentation

- Deleting of HWcontroler.h/cpp. Remplaced by hwcontroler.h/cpp for respecting standards of programmation standard

- Change of the name of the class HWcontroler by HWControler

- Reorganization of the HWControler class.
- Addition of the AudioCD class
which inherits the class Solid::OpticalDisc.
- Addition of the CdReader class which inherits the class Solid::OpticalDrive.
- Addition of the Songs class which inherits the class Phonon::MediaSource.

AudioCD makes it possible to recognize a reader CD. CdReader makes it possible to recognize a reader CD.