The libraries folder contains various decoding and tagging libraries, which i have created Xcode projects for, and possibly modified to make compile on OS X. The various libraries are under each of their own licenses/copyrights.
All Cog code is copyrighted by me, and is licensed under the GPL. Cog contains bits of other code from third parties that are under their own licenses/copyright.
Setup your `DEVELOPMENT_TEAM` like described in [Xcode-config/Shared.xcconfig](https://github.com/losnoco/Cog/blob/master/Xcode-config/Shared.xcconfig) to build the project.