Add plugin wow.py, which uses the World of Warcraft armoury API to fetch data, commands: .armory, .armoury
wow.py: Finishing touches, improved regex, clearer error messages, few bugfixes.
Identation: tabs to spaces, add Zarthus to CONTRIBUTORS.
Finishing touches: Remove trailing whitespace.
Make use of the 'requests' instead of 'http' library.

We now use the requests library, which doesn't throw exceptions on 404 unless you tell it to. Helping give more detailed error messages and resolving one small issue the code had.
Merge pull request #286 from Zarthus/wow-armory

Adds "armoury", a command which interacts with the World of Warcraft Armoury API