fixing javadoc layout bugs
Force ViewObservable be subscribed and unsubscribed in the UI thread
Merge pull request #880 from zsxwing/android-unsubscribe-thread-safe

Force ViewObservable be subscribed and unsubscribed in the UI thread
Remove Bad Filter Logic

This code was accidentally committed during exploration of groupBy/subscribeOn.
Merge pull request #887 from benjchristensen/filter-cleanup

Remove Bad Filter Logic