og_menu 7.x-2.1

General bugfix release and possible feature freeze for the 2.x branch.
Including:

- fixed page title formatting.
- #1355586: PDOException Column not found: 1054 menu_custom.menu_name line 410 of og_menu.module
- #1359780: incorrect variable name causes PDO exception
- #1278060: Move "Administer OG menus" to OG roles/permissions
- #1366562: "Cannot assign menu to invalid group, please retry" error when creating/editing a non-og menu
- #1397556: Titles on admin pages are double-encoded
- #1396998: Cannot add nodes to non-og_menus
- added og_ui dependancy
- #1392400: Menu block does not appear in group content type
- rewrote javascript while adding admin check to it.
- #1427660: unable to use og_menu as anyone other than user 1
- #1419680: Readme needs a cleanup
- #1307238: Needed permission to manage a menu via node/%/og_menu
- #1313426: 'Enable menu for this group' setting does not appear in the 'Manage Fields' form
- #1423078: Menu deleted when group node edited by user that is not a group member
- #793854: og_menu inadvertently implements hook_get_menus()
- #1571102: Group based permissions are currently ignored on node forms
- simplify node_form_alter, fix editing group content when using group based og menu access.
- Provide integrations with Menu Position and Homebox. General code cleanup.