Add hook documentation in bp-members-admin.php.

Props tw2113.
See #5944.


git-svn-id: https://buddypress.svn.wordpress.org/trunk@9267 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Add hook documentation in bp-members-classes.php.

Props tw2113.
See #5944


git-svn-id: https://buddypress.svn.wordpress.org/trunk@9268 cdf35c40-ae34-48e0-9cc9-0c9da1808c22