Removed all outdated dependencies, repositories, etc.
This allows us to have a clean state to build upon without having to care
about obsolete things.
Removed the deobf jar since forge can handle normal ones just fine since 1.8.9.
Fixed build errors during javadoc creation due to missing symbols caused
by ForgeGradle breaking gradle conventions and not providing the
necessary dependencies.
Added temporary(!) API dependencies, will resolved via Maven later on
Added mcmod.info
Added pack.mcmeta template
Added hacked BC jar to use facades indev
Split build logic into several pieces
Update gitignore
Modify build.gradle to match changes