use play-authenticate instead of socialauth
play-authenticate integration complete and access token available
introduce user update (from fb) operation. closes #100
Merge branch 'master' into issue100

Conflicts:
	conf/evolutions/default/1.sql
Merge branch 'master' of https://github.com/hakandilek/publicplay.git

Conflicts:
	conf/application.conf
	conf/play.plugins