Added line to readme advising apps that they may receive unexpected access code callbacks.
If running on iOS6 or newer, open StoreKit modal instead of bumping out to App Store app.
Add parameter to disable opening App Store/StoreKit on failed authorization.
Adjust example app nib so it renders better in iOS7.
Bump podspec.
Fix tag podspec is pointing to.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	FSOAuth.m