Comment out unnecessary things in user json_builder
Comment out unused queries in user model
Update total credit for user
Refactor debit_bills to class method on User
Refactor debtors bills owed to user
About to refactor friend out of user
Create friend model and use it to replace user in friend show. Need to clean up:
Add friend files
FriendsIndex now makes only relevant db query
Refactor user show to not refer to current_user and user separately
Add references to eager load
Refactor dbs json builder
Merge branch 'refactor_queries'