Update WoW plugin to build 18019.
Exclude files with DFSG licensing issues from tar balls (#1230)
Add translation update script with transifex issue workaround (#1195)

Script will do an lupdate run on mumble_en.ts, apply the duplication
of numerus tags workaround for the transifex missing string issue
(see #1195) and then create a commit with the updated translation
file. This file - at least for now - is meant to be run manually.
Make sure to check the created commit before pushing.
Translation update

Updating 'mumble_en.ts'...
    Found 1572 source text(s) (4 new and 1568 already existing)
Add transifex client configuration for project.

See http://docs.transifex.com/developer/client/ for the documentation
on the client. The two basic actions we need are:

    tx push -s    Pushes a updated source translation to transifex
    tx pull -af   Downloads all current translation overwriting the
                  existing ones.

Completely new translations have to be added manually to the
mumble.pro file to be picked up during compilation.