Update project setting to Xcode 4.6.2
Update QuickDialog to the latest master
Update PopoverView to the latest master
Update fmdb to the latest master
Resolve retain cycle warning
Update json url. Add releaseDate in download temp url. Prompt for update if schedule in effect
Fix typo valie to valid
Merge pull request #7 from gregwym/master

New json url. Check current date before update. Better temp path.