Started from scratch migration-wise

Implemented most ideas from the accounting book, like credit/debit accounts
Also leveraging django inheritance to make many different kinds of accounts
Updated models based on accounting book

Added ref to bootstrap and jquery
Added navbar template tag
Added most of inventory functionality.

Generic form template, List templates for vendor,
variety, coffeebag
Changed account querysets

Override get_form on BagTransactinAdd.
Make foreignkey fields use select_subclasses, so that the string representation make more sense
Implemented basic views for Accounting
Fleshed out the accounts list

Two columns, for debit and credit
categorized and summed