#2 Friend.equals(Friend) needs doing.

[Jake Mannix]

This is several bugs:

1) If a friend's userID is unknown when adding them
manually (likely), they'll get duplicated in the Friend
database, because once they are connected to, they'll
send us their info again.

a) need to implement comparison methods

2) Need to allow a friend to update their info to us.

3) other things related to this...