Fixes issue #1095
BugFix #1046 : Undefined method SessionInterface::getFlashBag()
Bug fix #995
Make ProcessValidator extendable
Take current item quantity from cart into account when checking stock
Merge pull request #1098 from umpirsky/fix/issue-1095

Fixes issue #1095
Merge pull request #1102 from umpirsky/feature/extensible-process-validator

Make ProcessValidator extendable
add order left asc in children and entity
Add getLastShipment() to OrderInterface.
Merge pull request #1104 from kayue/patch-7

Add back the missing getLastShipment() to OrderInterface.
PayPal's L_PAYMENTREQUEST_0_AMT should take unit price.
Extendable backend menu
Shipment state on hold while payment is processing
Merge pull request #1108 from kayue/patch-7

PayPal's L_PAYMENTREQUEST_0_AMT bug fix.
Use item equals method
Merge pull request #1091 from aRn0D/fix#995

Bug fix #995
Payum\Security\TokenInterface does not exists.
Fixed page route generator
Fix code to work with PHP 5.3
Merge pull request #1118 from stloyd/bugfix/php_53

Fix code to work with PHP 5.3