Tinker Time v0.6 Release

Hey @foonix and @jcsntoll, I think I'm ready to release the v0.6 beta.

Could you please download the jar from here and check it out?  https://github.com/oharaandrew314/TinkerTime/releases/tag/0.6-beta

Your old mods.json is incompatible.  A new one will be created in your GameData folder when you start TinkerTime.

NOTE: I don't need you to review the Pull Request.  It is just here to signify that you sign off on the commits up to this point.

### Release Notes
- Github Mod Support (as long as they release a built version of the mod)
- Automatic Module Manager Management (bleeding edge builds)
- Tinker Time Updater (no pre-releases)
- Cache Mod Images (no constant re-downloading)
- Integrate Progress Bar into Main Window
- Improve Curse Mod Compatibility (no more guessing URL for CDN)