Now saves reading position when ending tts.
Slightly smarter algorithm and bar instead of circle.
Fix for crashes
TTS playback should now be persistent on orientation changes.
Activities can now 'take over' the TTS playback queue.
Implemented basic text caching.
Added resource closing.
Better lifecycle management.
Now sends updates for start of chapter again.
Merge branch '2.0_bugfix'

Conflicts:
	src/net/nightwhistler/pageturner/activity/ReadingFragment.java
Added proper User-Agent for HTTP calls.
Back button works again and added support for custom feeds icon.