add missing twig extension in some renderResponse calls
fix non bundle prefixed template names
Fixed PHPDoc
Fix orders fixtures
First scenario for orders page in my account section.
Behat scenarios :
 - background
 - Viewing my orders
 - Viewing the detail of an order
Behat scenarios :
 - Trying to view the detail of an order which is not mine
Behat scenarios :
 - Tracking an order that has been sent
 - Trying to track an order that has not been sent
 - fixing typo
Behat scenarios :
 - Tracking an order that has been sent
 - Trying to track an order that has not been sent
 - Checking that an invoice is available for an order that has been sent
 - Checking that an invoice is not available for an order that has not been sent
Behat scenarios : fix typo
Behat scenarios :
 - Generating an invoice for an order that has been sent
 - Trying to generate an invoice for an order that has not been sent
 - Trying to generate an invoice of an order which is not mine
Behat scenarios :
 - web user
 - data context
KnpSnappyBundle
Behat scenarios :
 - web user context
Typo in Behat scenarios
Orders templates and routes
Adding KnpSnappyBundle
Rendering invoices as PDF
Fixing typo
Better templates for orders
Order actions : index, show and generate invoice