Added basic economy features.
If you don't want to use the new economy stuff, just set use under economy in the config to false.

To install:
1. Download EpicRename v1.8.jar
2. Download Vault (For command costs)
3. Delete EpicRename v1.7.jar
4. Delete the EpicRename Folder (To reset the config)
5. Start your server.
6. Enjoy

I rushed this update if there are any bugs or problems please post in the discussion thread.