First pass at dropping inner fragments.
fix #1474: theme search was crashing
Added onSaveInstanceState() fix for Android bug #19917
Moved initial update from ReaderActivity.onResume() to ReaderActivity.onPostResume()
Switched to commitAllowingStateLoss() for an extra level of safety
- Fixed an issue where the main Chart stop responding after switching blog
- Removed unused methods
- Upgrade comments
Merge pull request #1477 from wordpress-mobile/issue/1474-npe-theme-tab-fragment

fix #1474: theme search was crashing
Merge pull request #1479 from wordpress-mobile/issue/1475-illegal-state-tag-fragment

Issue/1475 illegal state tag fragment
Merge branch 'master' into develop
fix #1484: catch oom exception on BitmapFactory.decodeResource
getWPImageSpanThumbnailFromFilePath could throw an OOM
Merge pull request #1485 from wordpress-mobile/issue/1484-oom-startimg

fix #1484: catch oom exception on BitmapFactory.decodeResource
2.9.1 version bump
Merge branch 'master' into develop
Use context.getContext instead of getActivity and get rid of potential NPE.
Also fix few style issues.
Merge pull request #1480 from wordpress-mobile/issue/1435-drop-inner-fragments-stats

Drop calls to inner fragments management methods
Remove v4.support.Fragment and use native fragments.
Merge pull request #1488 from wordpress-mobile/issue/1436-use-native-fragments

Remove v4.support.Fragment and use native fragments.
Merge branch 'develop' into feature/android-studio-0.6

Conflicts:
	build.gradle