- added gitignore
- removed - (void)notifyProgressChangeWithPercent which was basically a copy of - (void)notifyProgressChange and modified the latter to support percent mode or the default mode depending on the progressPercent value.

- Note that when using the progressPercent, the slice drawn will be determined by each slice's percentage group. So if you pass 10% and you have 10 slices in progressTotal, then the first slice will be coloured. The second slice won't be coloured until 20% is reached.