Expand the import glob to include `**/*.git` to find projects in groups
as well as top level projects.  Check for existing group, and create
group if needed.  Set namespace_id for imported projects.

Checking the redis version will warn users that
are using an old version to update. Included
reference to the troubleshooting guide.

Rename add_users_to_project_teams to gitlab:import:all_users_to_all_projects

Rename gitlab:app:db_* to gitlab:backup:db:*
Rename gitlab:app:repo_* to gitlab:backup:repo:*
Rename *_dump to *_create

Renamed from gitlab:app:info
Add several extra info points