Fix BoardActivity, ThreadActivity, and GalleryViewActivity memory leaks
cache images in memory now that leaks have been resovled
Fix indentation
remove billing permission
replace nineoldandroids jar with official jar
Merge pull request #427 from yate/nineoldandroids-replace

replace nineoldandroids jar with official jar
Change file path for deploy
Merge pull request #428 from yate/travis-ci

Change file path for deploy
Merge pull request #419 from yate/memory-leaks

Memory leaks
fix bug where rotating the screen in a thread will take you back to the board page