adding a selection of groups for enrollment and invitation on the simulation-casting-2 page (using proc simulation::groups_eligible_for_casting). Storing enrolled groups as type auto-enroll. Invitations are a no-op for now.
changing permissible values for sim_simulation.enroll_type to open and closed. Addint the type (enrolled, invited, auto-enroll) column to sim_party_sim_map
fix indents on recovery.xml, mention installs on 9i, mention does not on pg7.2, fix userinput on some recovery instructions, fix tar flags for extract (was xzv rather than xzf)
