Support applicationUsername on addPayment
Do not save the transaction receipt if the deployment target is iOS 7 or higher
Improve userIdentifier doc
Not needed when deployment target is iOS 7 or higher
Convenience addPayment method without user
Weak link applicationUsername
Mark availability of addPayment:user:success:failure:
Method for restoreCompletedTransactionsWithApplicationUsername:
Getting and refreshing the receipt
Refresh receipt with blocks
Merge branch 'master' into ios7
Workaround for lack of .gcda files in Xcode 5

See:
http://stackoverflow.com/questions/18394655/xcode5-code-coverage-from-cm
d-line-for-ci-builds
Minor refactoring and formatting
Negate NSAssert
Return receipt url instead of data
RMAppReceipt
Receipt tests
Fix testRestoreTransactions_Nil_Nil
applicationUsername tests
openssl-1.0.1e