Use ModelSerializer instead of HyperlinkedModelSerializer.
Merge pull request #72 from gregwym/api-model

Use ModelSerializer instead of HyperlinkedModelSerializer.
Add api to retrieve current user.
Adjust API to provide extra info about Invoice and Order.
Adjust base template to include common ng scripts and add ng blocks.
Implement basic invoices view for account page.
rename invoiceList to ngInvoiceList.
Refactor Invoices controller with init function and underscore high level functions.
Implement basic invoice detail page.