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Version 2.0 is a robust, consistent and clean overhaul of 1.x versions. The main philosophy and scope of the library stays the same, but concepts have been refined to precisely delimit the purpose of the library, making it easier to integrate, more reliable and stable, in short, more enjoyable to work with.
Starting with 2.0, Carthage is the only supported way of integrating the library with your project. Have a look at our Migration guide for more information about what changed and how you should migrate your code.