Fixed items that only differ in their NBT tag potentially being merged when picked up by a robot. Closes #449.
Fixed chunk loader upgrade remaining active when robot powers down, should resolve #447.
Merge branch 'OC1.3-MC1.6.4' of github.com:MightyPirates/OpenComputers
Merge branch 'master' of github.com:MightyPirates/OpenComputers