Adds permissions for the commands that were previously missing them.

An update on https://github.com/sk89q/worldedit/pull/255, as requested since the helptopic logic was updated.

Before pull-request:
![we-pre](https://f.cloud.github.com/assets/931325/924861/996a1296-ff6f-11e2-9a86-46f5e43a28e0.png)

After pull-request:
![we-post](https://f.cloud.github.com/assets/931325/924867/a8e33f68-ff6f-11e2-9bcb-45cbbaf48a65.png)

Permissions were also added for /we reload, /we tz, and /we version, because (although they could not be seen) players could still use the commands.


One more issue exists, though, due to the new helptopic logic - players without permissions can still use "/tool" and will see "/tool <brush>" prompted to them. Using "/tool brush" will respond with "You don't have permission to do this," as they have no permissions, but due to the double-nesting of commands ("brush" is a nested command under "tool," which is also a nested command) the new logic fails to see that the user has no permissions for the brush commands and displays it, anyway.