Add WAILA support for relocators

Bugs:
 - Doesn't work with FMP parts.
 - No stuffed items.
This will not work for Multiparts, because the Tile is TileMultipart. You should get the stuffed items from the NBT. Like this: https://bitbucket.org/ProfMobius/waila/src/b8883575a71f810d4a1685002b00511127f4774f/mcp/mobius/waila/addons/thermalexpansion/HUDHandlerConduitItem.java?at=default#cl-25
You will need to register the NBT syncing like this:
https://bitbucket.org/ProfMobius/waila/src/b8883575a71f810d4a1685002b00511127f4774f/mcp/mobius/waila/addons/thermalexpansion/ThermalExpansionModule.java?at=default#cl-127
You need to do this, because the client doesn't know what items are stuffed, it only knows that it ís stuffed.