First commit, module can now handle subgroup permission inheritance.
Fixed tabs and added some documentation.
Added test file
Added hook_node_access_records_alter() to allow view permission to a user subgroups, even if he's not member of the sub group.
Also I extended og_subgroups_get_reverse_hierarchy_tree_perm() function to return the reverse tree structure with level information.
Modified a case of node view access, when the node content is set to default access, treat as private if permmision was alreaty set in the grant array.
Documentation
Added some documetation, and improved og_subgroups_node_access_records_alter hook.
Checking if module og_access exist to view permission, also working on new simple test for the new functions
Fixed php header
Add some more testing
Minor comment fixes.
Fix call by reference.
By bricel: Add plugin to show subgorups using Graph API.
Add API function to get hierarchy tree, that can be used e.g. to get breadcrumb trail.
Make width of canvas a bit bigger.
Fix merge conflict.
Remove tabs.
Check graph API is enabled before uusing it.
Initial commit for branch 7.x-2.x that includes patch from http://drupal.org/node/1536178#comment-7133760
Updating README and ignore