Allow members of a group access to a department

Reviewed-by: Jared Hancock <jared@osticket.com>

Change enableGroupMembership() to isGroupMembershipEnabled(). Improve getMembers function. Make sure  is an array in updateAllowedGroups

Tickets view export only dumps one page

Reviewed By: Peter Rotich 07/16/12.

- Move access to it's own table.
- Refactor what department membership means in relation to group access

- db_input now hadles arrays correctly.
- Code style cleanup..etc

Support two-character staff usernames

Reviewed-by: Jared Hancock <jared@osticket.com>

Fix uploading attachments from eMail

Reviewed-by: Jared Hancock <jared@osticket.com>

Ticket Print Options

Revied-By: Jared Hancock

Use email priority when available

Reviewed By: Peter Rotich 07/09/12

Support canned response definition for email filters

Reviewed By: Peter Rotich 07/09/12

Sort of Reviewed By: Peter Rotich on 07/08/12.

Reviewed By: Peter Rotich on 07/08/12.

Reviewed By: peter Rotich 07/08/12

Add print options supports - staff can now print a ticket thread without internal notes + select paper size on the fly