Merge pull request #1 from harlanhaskins/master

Fixed tinting color for MURSwitcherButton and cleaned up setting tint co...
Merge pull request #2 from harlanhaskins/master

Converted data types to JSON.
Fixed crash with activity.
Added new field to User Activities (“extra” including things like ratings and such.)
Cleaned up activity display.
Added JSON validator that handles NSNull gracefully.