CE-1162 WAM index page redesign implementation

! DO NOT MERGE !

See [CE-1162](https://wikia-inc.atlassian.net/browse/CE-1162)

This PR contains changes in the [WAM index page](http://wikia.com/WAM) and necessary changes in WAMService that will allow to present WAM scores for the new 7 verticals.

The work is still in progress but I would like to start a review for the changes:

@kvas-damian @Grunny @SebastianMarzjan - can you take a look at the changes? (especially SASS, JS and WAMService ones)
It may have been premature of me to send this pull request after all, although I didn't expect more changes in the db schema. I am sorry to mess it up, I'll take it into account next time.