Fix for HOA button not working

Fix for the HOA button not working
* Added `HOA.js` and `users.js` to assets pre-compiling step

**Bonus**
* Adjusted `Article` tag typeahead css to realign texts
* Moved `nprogressbar.js` and `typeahead.js` to `vendor/assets/javascripts` folder

**N.B** Tested on Heroku