Reveal by pub sub

New modules:
- moj.jquery-pub-sub.js
- moj.reveal-pub-sub.js

Added comments and examples in the moj.reveal-pub-sub module

The _employment.html.slim has rather allot of changes and @Demwunz might need to redo some minor changes after this is merged but he is aware of it.

We could just do away with this init function if all it is doing is running `bindPublish();` and `bindSubscribe();` by turning those two methods into IIFE's.