New version of SimpleAmp:

- id3 v2 skipping (to avoid header read errors)
- .mp3 songs buffering
- clock work frequency reduced to 266 to enhance battery duration
- new audio functions: NORMAL, SHUFFLE and REPEAT
- improved graphic visualisations: EQUALIZER, OSCILLOSCOPE and BOTH
- Audio Gain Volume
- Fast rewind / Fast forward
- main graphical restyling
- enhanced graphical core
- various bugs fixed