Fixed issue when password field apeared, when it should not do so during social network signup
Added support of `yii-user` banned and not activated account status
Support of sending activation email by `yii-user` module. Ability to register a new account with the same SN, when in db still exists SN relation to account that was deleted
Merge branch 'master' into 8-widget-for-authorized-user

Conflicts:
	CHANGELOG