Quran 2.2.0

• fast switching between translations #218
• upgrade process for translations
• move to maven
• migrate audio files to /sdcard/quran_android/audio instead of temp app directory
• bookmarks changes
• exposed an intent to allow launching Quran directly to a page/verse - #183
• navigation using volume keys - #172
• fix navigation bar jumping on jellybean
• option to overlay page number, sura name, and juz' on the page - #159
• fix actionbar not toggling on translation view on honeycomb+ - #158
• fix ldpi devices not being able to download over 3g in certain cases - #167
• relax constraint on deciding whether or not data is downloaded - #196