Add pdf response for order quote
Merge branch '2-2-stable' of github.com:hecbuma/spree_quotes into 2-2-stable
Add ability to generate the pdf of quote orders
Changes:

- Add payment_received column in spree quotes table
- Add state column in quotes index
- Add update functionality in controller
- Add checkbox to edit payment received data
Multiple changes:

- Add validation to show 'no paid' or 'paid' based in payment_received field
- Add helper
- Update methods in controller to handle errors
Merge pull request #4 from jtapia/2-2-stable

Multiple Changes