WIP on displaying invoice list, single page app switching
display to invoice detail
Partial fix for issue #2
Morew work on invoice list (issue #2)
Issue #2 - A little closer
Some more items off the todo list for this feature
- WIP how to get a new invoice created from server, choose customer is necessary for invoice POST
Mostly done with invoice list/detail view.
Need to check todo's and wrap up issue #2
Fix paid/sent checkbox clicks
Fix ESC key in detail view
Add invoice deletion support
Issue #2: fix display of unit price, add form validations
Fix up lineitem handling from invoice
Need: ESC handling when from inside an x-editable control
  - Way to trigger new line item while in invoice
Completed invoice list and detail view
 - Closes issue #2
Merge pull request #8 from aztechian/invoice_list

Fix issue #2 - create invoice list view