Added HttpUtils. Used for downloading files, and possibly more HTTP related functions later on.
Added a Dependency API that will allow plugins to call into this API, and download dependencies hosted from our servers. Also added a thread that runs upon startup that will retrieve the repo JSON file. This is my replacement for Grape, rather than actually using it. I think it does it's job, and will be continued to be improved upon the development of Minetweak. If you'd like to submit a request for a dependency/library, just create an issue on the issue tracker at: http://minetweak.atlassian.net/. We'd very much appreciate you doing so, it will help other developers such as yourself create great plugins!