Added the invoice application to the settings.
First model draft
Ignore the sqlite db
Made the Invoice comment field optional.
Base template.
Requirements added.
Added the invoice list view / url / template.
Added invoice detail.
py.test configuration files.
First test to ensure gross_amount works.
Added more property about amounts for Invoice and InvoiceItem.
Added the totals to the invoice details.
Added VAT totals.
Ignore local js/css copies for offline mode.
Added Django debug toolbar.