iOS: send correct allowThroughput query string param to probe server
iOS: Redesigned demo app
iOS: Update About page
iOS: Only do remote probing when the user requests it
Implement Speed Test view
iOS: Work on code signing
iOS: Add some more device properties to RUM reporting; bump build number
Add iTunesArtwork
iOS: Clean-up iOS project

Also:

 - Bug fix: fix crash when user clicks Run Speed Test button rapidly
Bump build to 1.2

Minor change to short circuit old threads if the user clicks the
Run Speed Test button multiple times.
Increment Build number and update for XCode 5
Fixed 2 bugs:

 - Fix crash navigating to the Measurements page:

   "NSFetchedResultsController crashing on performFetch"

 - Fix zero division error when throughput measurement fails.
CEDEX-4835: Take steps to prevent a crash if init fails

Check to make sure the request signature we get back is an NSString
and not nil.
Invoke Radar through a singleton (iOS)
Fix typo in method name (iOS)
Prevent simultaneous Radar sessions (iOS)