MFM: Lock ups fixed and a new GitHub Importer.

This release is a major update on the GitHub importer logic, updating to all the latest versions of libraries used, and quite a few bug squashing! This release still requires a full git installation to be installed and working to import themes and extensions. I'm am working towards making that process completely internal to the program. I have fixed several areas where it was locking up and polished other areas to work better. Let me know how it works for you!