Carthage Support

Hi,

Great library. Eager to use it.

I'd like to contribute, but the code doesn't compile when I pull from master. It may work if I use cocoa pods to manage the dependency on the string parser. But I would rather not use Cocoapods.

I don't mind adding Carthage support for you later on.

By all means, keep Cocoapods as an installation option, but could you remove the dependency on Cocoapods please ?

Thanks.