More likes

This PR adds likes to a users profile such that they can 
a) view the posts they have liked (and remove said like)
b) view their posts liked by others, so they can revel in their awesomeness, as see the list of members that liked it.

To do this and not abuse the DB I've added a new column and a couple of indexes ... actually one index is needed for the current functions, one for the new profile functions (id_poster)

I put all of the functions in the current likes.controller and likes.subs and did not put them in a separate profilelikes.xxx ... let me know if that is preferred over the consolidated approach.