Worldedit Wand

[pickardjoe]

Added a WorldEdit wand item that can be used to select areas with WorldEdit. Inspired by a mod from another voxel-based game.

[sfan5]

please fix:

• your code style:
•   Lua is not C, don't add semicolons
•   if doesn't need so many braces
• a texture being missing

[pickardjoe]

@sfan5 I've implemented these changes.

[sfan5]

:+1: 47712844a3f2551aedfa9e39cc3a8cc06e01993e