Improve documentation in the Friends component. See #5022

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7644 cdf35c40-ae34-48e0-9cc9-0c9da1808c22
Improve documentation in the Groups component. See #5022

git-svn-id: https://buddypress.svn.wordpress.org/trunk@7645 cdf35c40-ae34-48e0-9cc9-0c9da1808c22