Добавил XML и шаблон активити для настроек

Используется вариант для ActionBarSherlock. Следует от него избавиться,
перейдя на min-Android4.
Убран ActionBarSherlock, обновлены min/target api level

Теперь не запустится на Android < 3.0
Merge branch 'update_sdk11' into config
Добавлена ConfigActivity, перенесена логика туда
Added actionbar item for settings on main activity (doesn't work)

Currently it crashes app.
Added actionbar icon for settings
Added Settings activity to manifest

This fixes crash on opening settings
Russian strings
Xml layout fixes
Translatable title for rootPath setting
Added Settings helper class
Settings: reinit DataManager on rootpath change
DataManager: use root path from settings
DanceListFragment: nicer look on api11
DataManager: implemented DataChangedListener support
DataManager: added removeDataChangedListener
DanceListFragment: use onDataChanged to (re)load
fireDataChanged: debug
Settings: really listen for pref changes
DanceListFragment: minor