[emlenton] Added null checks to the expectedSignatureValueForResponse:... method as it was crashing when responseString was null; responseString seems to be null when the data isn't properly UTF8 encoded
[1.13.2-release] Merge branch 'emlenton' into 1.13.2-release Conflicts: src/PHAPIRequest.m
[1.13.2-release] Bumped version numbers
[1.13.2-release] [1.13.2-hotfix] Fixed issue with signature validation caused by fact that X-PH-DIGEST response header has different form on different iOS versions. F.e. X-Ph-Digest instead of expected X-PH-DIGEST.
[trek]Updating for r1.13.2 iOS SDK release ..
[trek]Updating for 1.13.2 iOS SDK release ..