Created user interface with preferences

- Option to disable safe headset volume warning
- Option to hide the icon from your launcher
- Created custom VolumeStepsPreference
- Added license file
More streams supported and internal improvements

- Added support for the alarm, ringer and voice call stream
- Added reboot dialog
- Improved layouts
- Cleanup and improvements
New icons and actionbar
VolumeStepsPreference update
v1.0.0 release