Merge branch 'release/3.0.3.0' into develop
Travis can use python-lxml apt package #3907
Fixed flake8 issues
Merge pull request #31 from aroraumang/flake8ify

Fixed flake8 issues
Merge pull request #28 from param107/feature/task-3907

Travis can use python-lxml apt package #3907
Fix NoneType error when trying to update cart quantities
Merge pull request #30 from pokoli/fix_update_cart

Fix NoneType error when trying to update cart quantities
Use new route decorator
Moved _add_or_update method from cart to sale #4366

Added depreciation warning in cart._add_or_update
Add new method to update taxes in sale #4366
Merge pull request #34 from tarunbhardwaj/develop

Moved _add_or_update method from cart to sale #4366
Added refresh taxes to sale line #4366
Merge pull request #35 from tarunbhardwaj/develop

Added refresh taxes to sale line
Merge pull request #33 from prakashpp/develop

Use new route decorator
Only salable products can be added to cart #4488
Merge pull request #36 from prakashpp/develop

Only salable products can be added to cart #4488
Added coveralls #4507
Merge pull request #37 from aroraumang/feature/task-4507

Added coveralls #4507
Separated finding of existing line to a separate method
Merge pull request #38 from prakashpp/develop

Separated finding of existing line to a separate method