Edit feature

@heyjinkim Yep, you're totally right- it appears to be broken :disappointed: 
I tested the site and found some interesting things though. Upon logging in (http://0.0.0.0:4200/) I'm taken to a main page where I can only favorite: there's no checkin option. 
If I then click on on the "checkin" tab I'm taken to the checkin page, where the edit capabilities I added appear, allowing for one to edit a comment by a checkin. However, the favorite capability no longer works here.
Then if I click on "buddfeed," the favoriting capability reappears, but there's no option for checkin.

Presumably I should refactor the code so that both capabilities (favoriting, editing) are able to be enacted on all the pages (initial page when signing in, checkin, buddfeed)?