Potentially fixes #287 by removing the second call hook to open the GUI of the portable cell

Added copyrights
Reformated code
Rearranged code
Added copyright to all java files
HotFix, potentially fixes #260 through catching a null node

Added copyright
Reformatted code
Rearranged code
Merge pull request #433 from thatsIch/copyright

Added copyright to all java files
Merge pull request #435 from thatsIch/hotfix-260

HotFix, potentially fixes #260 through catching a null node
Merge pull request #432 from thatsIch/portcell

Potentially fixes #287 by removing the second call hook to open the GUI of the portable cell
Fix #449

Fixing right-click animation and some other kind of duplicate items. (Like portable cell did)
Merge pull request #452 from TheJulianJES/patch-4

Fix #449 duplicate message display and attack animation