FIX Advanced menu replacement error
- replecemenet was made only once and modified against first logged in user
ADD User relations listing and request actions
1) ADD ajax email guesser
- activate by "data-guesser=email" on input
- add 'div#email_guess' after input
- return guesses after 3 chars of email provided
2) ADD User relations listing
- separated into groups (new, active, refused)
3) ADD User relation request new relation
- relation can be only created in direction from -> to, so player
can not request relation instead must wait for comming request from coach
- TESTS:
-- valid user in system
-- relation not duplicit