Merge pull request #153 from crystalist/master

Set drawables for imageviews to null
Updated the options menu on the Main screen (no "More" menu, icons flow onto the action bar if there's room, everything is Android 3.0+ compliant, other minor things)
Fixed a quote that rendered a mystery character
Removed the home button in the Gym Activity (back button is meant for that) then did some code cleanup
Merge pull request #154 from MasterOfLight/master

Minor changes throughout the app
fixed xml for social activity