Add modules to WAILA for relocators.

Bugs:
 - Doesn't work with FMP parts.
 - No stuffed items.
Further work on stuffed item rendering, currently does not work.
Attempt adding FMP support, so far, no good.
Stuffed items does not work, due to not using NBT.

Split WAILA handlers into seperate classes.
Merge pull request #138 from MCMicky2506/waila_integration

Add WAILA support for relocators