improve error message for install from tar
fix log lines to be consistent and documentable
allow groups in subconf files...

...simply expand them and pretend the repos were listed individually!
(contrib) user key management

committer's notes:

code here, and docs in gitolite-doc repo, fetched from

    git://github.com/hemmecke/gitolite
    git://github.com/hemmecke/gitolite-doc

respectively.
Add script for querying IPA-based LDAP servers for group membership