Update to ElkArte 1.0.1

Now uses the new hook provided in Elk 1.0.1

First basic version for ElkArte

Released the first version of the addon for ElkArte.

It has just the very basic features, not even localization.

0.3.99e

Still beta release of the "next version".

It is not entirely "production ready", but it should work in most of the cases.