Correcting permissions to guidelines.

Files in Tryton modules usually should be 644.
Merge pull request #62 from mbehrle/feature/perms

Correcting permissions to guidelines.
Abort 404 on delete-line if cart don't have sale
Merge pull request #65 from tarunbhardwaj/develop

Abort 404 on delete-line if cart don't have sale
Create a cart instance with unsaved active record for empty carts #6402
Use POST method to clear cart
Merge pull request #67 from aroraumang/feature/task-cart

Create a cart instance with unsaved active record for empty carts #6402
Released version 3.2.0.6
Merge branch 'release/3.2.0.6' into develop