Add .pryrc config for Pry console
Better prompt, awesome_print, history in local .pry_history file, editor config in ENV
Ignore .pry_history
Generate models for Invoice and InvoiceLine
Playing around with the BillApp API
Usage example:
    invoice_resource = BillApp::ResourceFactory.resource_for('invoices', Invoice, 'agenda', 'user@example.acom', 'pass')
    invoice_resource.all # => instances of Invoice model fetched through API
We are going to fetch user's name through the API