Bugfix release for issue 1877738.

A large number of changes, including backporting of all the features that have been added in the Drupal 7 version:

Fixed minor problems found during automated code review & testing

Fixes issue when calculating tax and shipping line items.
Fixes issue calculating product option price adjustments.
Adds feature providing the ability to purchase roles.
Adds feature to pass a product category to FoxyCart by using the Ubercart Catalog vocabulary.

Dev release for the new 7.x-1.x version of password_trigger

Changes since 7.x-1.8:

• #1801478: Fix field definitions for cross-database compatibility.
• #1788626: Check if columns already exist.
• #1876832: Fix pdftk path check.