Change `findLastVisibleItemPosition()` to `findLastCompletelyVisibleItemPosition()`
Use floating action button instead of `MenuItem` for reply
Add `windowTranslucentStatus` and `windowTranslucentNavigation` effect
Fix wrong contextual action bar color in light theme
Fix wrong `CardView` margin in Lollipop
Tweak code

* Fix wrong `tools:context` for menus.
* Rename incorrect string names.
* Remove unused things.
* Adjust comment.
Bump dependences and add forgotten updated files when add the FloatingActionButton library

* Bump to Gradle 2.2.1 and Gradle plugin 1.0.0.
* Bump to `jackson-databind` 2.4.4.
* Add `shrinkResources` to release.