Rough draft of WEPIF for WorldEdit-Forge. Mainly for FE compatibility, but other mods can implement this if they so want.

This commit removes ForgeUtil, with its 2 methods relocated. To set a permissions provider, get the instance of ForgeWorldEdit, and call setPermissionsProvider with an instance of a class implementing ForgePermissionsProvider.
Update build.gradles for ides
Remove the requirement of / for files
Add Bukkit adapter for Spigot 1.8R1.
[Bukkit] Fix missing configuration file.
Update the changelog.
Merge pull request #310 from kenzierocks/feature/multi-project-ide

Add support for IDEs in the Gradle build files.
Update internal block data for 1.8, without updates to block bag data.
Update changelog to include MC 1.8 updates.
Release 6.0.
Bump to v6.0.1-SNAPSHOT.
Closed a set of quotes in JavaDocs.
Merge pull request #309 from luacs1998/master

Add temporary permissions API for the Forge mod.
Update changelog for 6.0.1.
Version 6.0.1.
Set version to 6.0.2-SNAPSHOT.
Merge branch 'master' into feature/forge-1.8