Transactions entity and managed object subclass
Transaction View Controller stubs
Fill transaction controllers with copies of account controllers (broken)
Change all instances of "account" to "transaction" in Transaction controllers
Selecting an account displays the Transactions View Controller
Log errors thrown by the managed object context
If managed object creation fails, delete the object to unblock the context
Only display transactions in the selected account, sorted by date
Transactions cannot be reordered
Hide the transactions edit button (for now)
Add transactions successfully (with filler data)
Transaction date and amount values from user input
Edit transactions
Merge branch 'transactions' into develop