Updated mediawiki/extensions
Project: mediawiki/extensions/MassMessage  e40bf2da0593a4e37e15c8be73389649332d1be3

Initial commit of already written code

Provides a special page to let users send a message to multiple users at once.
I've already started adding in some global variables, but no actual functionality for that yet.

Change-Id: I8566b7c13aca7ffa03cf443debd9a52923d04c69