docs(lists): Fixing various typos and improving readability
docs(lists): Fixing various typos and improving readability

Updated Tutorial to go in flow with the previous sections. export was missing, selector was not correct. removed moduleId, which could have thrown errors for new users. Component name has been corrected.
maneesht/angularfire2,maneesht/angularfire2,maneesht/angularfire2,angular/angularfire,angular/angularfire,angular/angularfire,angular/angularfire,maneesht/angularfire2