Stuffed item improvement

Still needs work, as:
 - [ ] Stuffed items all drop out, not 5 stacks at a time. (Not sure how to do this).
 - [ ] If ForgeMultiPart is installed, none of this works. (Needs hooks in `PartRelocator.java`, not sure of method names.)
 - [ ] When player hits a relocator, the purple/black untextured particles appear.
 
Relocators, with this change, will not break if left click on the stuffed connection, and will drop all stuffed items onto ground. If clicked anywhere else on the relocator, the relocator will simply break.

Once everything is done, this will close #130.

@Dynious: Are you sure we shouldn't go with the option of opening a chest like inventory?