PT-1422 - Added error handling around process signatures workflow database inserts.
PT-1422 - Improved username generation collision prevention.
Changed signatures_queue_validation_grace_period variable_get() to default to two days.
PT-1437 - Fixed some vulnerabilities to invalid user input in the preprocess signatures workflow.
Updated target revision of petitionssisngatureformmodule in drupal-org.make.
Incremented version number to 7.x-2.0-rc26.