Added fb-id to info.plist.
Created class for Page matching database on parse.com
deleted unused code.
Added class Tag according to database on parse.com.
created a new tab and added class LoginViewController with a button.
added logoutBtn.
added parseFBLogin (start code).
login and logout to fb working.
retreiving user email from facebook to add in parse-database.
removed unused code.
Merge remote-tracking branch 'origin/master'