Add handling for taxes
Merge branch 'release/2.4.0.1' into develop
Bump version to 2.4.0.2dev
Merge branch 'taxes' into develop
Remove deprecated lookup of guest_user from application

Lookup of guest user from application is due for deprecation as
it can be easily obtained from the current website and could differ
from website to website.
Migrate to new 2.4 testing style

As part of the inclusion of nereid into tryton core
the test suite and related capabilities were updated to
use the standard tryton test fixtures.

This patch follows the changes other related modules have had
in the path and updates testing to 2.4.0.8 style.
Add .travis.yml for automated CI
Migration to Tryton 2.6 Active Record pattern

* Bump version to 2.6.0.1dev
* Adds audit and xmltests command to setup.py.
* Refactored test cases to install company module first and then
  install the nereid_cart_b2c.
* Remove sale, invoice and shipment method from Website as they should
  have their own handlers in the corresponsing models.
Add classmethod decorator to _get_addresses

This method is intended to be used as a classmethod and
was missed out in the active record migration
Release Version 2.6.0.1
Bump version to 2.6.0.2dev
Merge branch 'develop'