Move FMP stuff to a separate package.
Change to IStickyBlock
Fixed implementations of IStickyBlock
Added Proxy registry, so we can register proxy interfaces for other blocks.
Started work on an FMP packet describer. May not be use it in the end.
Added some SideOnly annotations
Started work on a power system. Pullers are no longer sticky on their face side.
Added a catch for stubborn tile entities.
More SideOnlys