Whole bunch more stuff
- Starting transaction is created when account is created
- Now see cleared balance, uncleared balance, and total balance
  on the ledger screen
- See the account balance next to each account in the sidebar
- Rename app "budget" to "ledger" (I see multiple apps in our
  future)
- Broke out the account create view into a separate Form class
  and a FormView class
- Refactoring and other stuff I forgot
Fix form action (minor)