I finally integrated everything I wanted to, and because of this, the plugin-version is 1.0 now.

Bug fixes:

+ Fixed a problem with the Scoreboard. (Reported by @gumgumpuntnl)
+ Fixed a problem with the ColorCodes. (Reported by @rex1167)

Added:

+ Added every plugin message to the Messages.yml File.
+ Added a Voting-Inventory for votings (/wv by default).
+ Added an option to disable the UseVoteGUI in the config.
+ Added Error-Messages, if someting went wrong, to the console output.

The source code of the plugin is now available on GitHub. (The Plugin is under the MIT license.)