Deprecate old pod thats already been depricated

[kylebrowning]

Line 91 here, https://github.com/CocoaPods/trunk.cocoapods.org/blob/master/app/models/pod_version.rb#L91

Doesn't let you re-depricat in favor of.If a cocoa pod goes through two name changes, the author doesn't have the ability to point to them to the correct new pod.