Merge pull request #447 from bhariharan/unstable

Update to latest shared commit
Invoking iOS 7 fixes for passcode, in an iOS 6 build environment
Updating SDK version number
Copy paste fail on version numbers
Merge pull request #448 from khawkins/fix_passcode_in_ios6_build

Fix iOS 7 passcode view in iOS 6 build environment
Merge remote-tracking branch 'origin/master' into unstable

Conflicts:
	external/shared
	shared/SalesforceSDKCore/SalesforceSDKCore/Classes/Common/SalesforceSDKConstants.h
Merge pull request #449 from khawkins/unstable

Mobile SDK: Merging master into unstable
Do case insensitive comparison of callback URL, since it is returned in lowercase always