Fixed some more shift-click bugs/exploits

Fixed - Scribe table consumes all the ink on shift-click + on full
inventory the plan will get deleted
Fixed - Barrel item duplication exploit
Fixed - Sluice item duplication exploit + shift-click with full
inventory will delete the item
Merge pull request #50 from emris/FewMoreShiftClickFixes

Fixed some more shift-click bugs/exploits