og_menu 7.x-3.1

This is a general release with many improvements that have been in dev for quite a while.
Updating is recommended for all users.

This update requires database updates to run. Always test on a backup of your site before attempting any database updates.
Another important thing to know is that the OG Menu menu overview page url changed to admin/structure/menu/og_menu.

Full list of changes:
- Issue #2328915: Method to assign weights to menus by mccrodp, Chris Burge: Method to assign weights to Menus
- Improved og_menu_context_limit description in settings.
- Fix some issues where in some usecases, a user did not have the needed access permissions, or vice versa. Removed some dead code as well.
- Issue #2395087: Contextual links make menu display as empty by heddn, azinck: Contextual links make menu display as empty
- Remove states for og_menu_hide_create_option setting.
- Revert removal of code that sets the original parent when editing.
- Issue #2495717: Group menus are not populated using entityreference_prepopulate by rvilar: Group menus are not populated using entityreference_prepopulate
- Issue #2572877: Method to assign weights to menus needs ORDER BY clause by jstamper: Method to assign weights to menus needs ORDER BY clause
- Issue #2648462: Add index to og_menu table by drumm: Add index to og_menu table
- Issue #2700613: Cannot add index gid_group_type_weight to table og_menu: index already exists by heddn: Cannot add index gid_group_type_weight to table og_menu: index already exists
- Issue #2672082: No link to add new menu items once the first one is added by DamienMcKenna: No link to add new menu items once the first one is added
- Issue #2553455: Groups without content don't appear on Edit Menu page by jeffschuler: Groups without content don't appear on Edit Menu page
- Issue #2411775: Drop main admin area under admin/structure/menu by dstol, rv0: Drop main admin area under admin/structure/menu
- Issue #2662618: Can't edit or delete Menu Items: Can't edit or delete Menu Items created by the Default Links feature. (added variable to bypass this issue)
- Issue #2468637: Notice: Undefined index: #markup in og_menu_block_view() (line 289 of ../og_menu/og_menu.module). by lhridley, rv0: Notice: Undefined index: #markup in og_menu_block_view() (line 289 of ../og_menu/og_menu.module)
- Replace autocomplete logic by autocompleteSelect event handler provided by core.