Added search users by roles (e.g. 'is:hacker', 'is:forhire is:hacker') and full text search on the user's bio by keywords (e.g. 'python backend developer'). Search by roles and keywords is also possible (e.g. 'is:hacker is:forhire python'). In order to test full text search on dev you need to connect to a PostgreSQL database.
Merge branch 'user-search' of https://github.com/crazirican/sopr-platform into crazirican-user-search

Conflicts:
	Gemfile.lock