Support installation as MediaWiki userscript

[lahwaacz]

Let this be the MediaWiki userscript support meta-issue 😆

The standalone version actually works, but...

• Userscripts are not loaded on Special:Preferences for security reasons, so the configuration does not work 😢
  But custom settings could logically be set directly in common.js before loading the Wiki Monkey script.
• jQuery is already (and always) loaded by MediaWiki, so it does not have to be put in the bundle.
• The top-level check if (location.href.match(/^https:\/\/wiki\.archlinux\.org/i)) { ... } is useless for a MediaWiki userscript and hinders testing on localhost.

[kynikos]

Thanks for testing it! I'm translating the whole project to CoffeeScript, which should make the application more flexible and modular, eventually making it easier to support different installation methods. Points 2 and 3 should be easy to implement, point 1 a little less, but still nothing major, I hope.

Slightly related: #163