formatting
fix start stop restart Application issues (Stop player on application destroy, reinitialize when restarting)
lower case for methods
remove stupid getter and setter from Preferences
get last played track on next start
scrolling tracks alway takes next, reandom should be triggered only if random button pushed. next/prev makes not much sense, better invent a history prev/next. old school repeat removed, never used this shit
adapted gui to previous commit
dont quit so fast (when pressing back in setting or playlist slide)
desparate try to avoid mem leaks - somehow all references are still set on a second onCreate call ^^