workflow 5.x-2.0

This release brings compatibility with actions 5.x-2.x (the backport of Drupal-6-style actions).

It also moves actions assignment from the workflow module administrative interface to the triggers interface.

This is a "point-zero" release; please report bugs in the issue queue.

Changes since workflow 5.x-1.2:

• #247568 by snoble: remove primary key from Postgres workflow_access table
• #247617 by snoble: add stamp field to workflow_node table for Postgres
• added status field to workflow_states table so deleted states are not deleted; they are just flagged as deleted. This preserves workflow node history even if a state the node has been in is deleted.
• workflow tab page now themes current, regular and deleted states differently
• #128874 approach by JacobSingh: reassign soon-to-be-orphaned nodes to a different state when a state is deleted
• added autoincrement field hid to workflow_node_history table
• added force parameter to workflow_execute_transition(); disregards permissions when true
• added advanced action: Change workflow state of post to new state
• convert Change workflow state of post to next state action to D6 style
• remove code related to actions assignment; actions module provides this
• remove workflow_actions table; on update datais transferred to the actions_assignments table, then workflow_actions is dropped
• #244870 by ugerhard; now minimally works with actions 5.x-2.x
• #116733 by JacobSingh and others: fix state ordering on workflow tab; and code cleanup
• #166495 by thierry_gd and emdalton: add uninstall capability to workflow and workflow_access