Assigning repo managers, clarifying roles

Also related to https://dev.gitlab.org/gitlab/organization/issues/501
The intent here is to clarify which individuals are the 'point-person' for a particular project. There are some projects listed from the dev server, but there are fully 79 projects there so I did not list all.

Individuals 'affected' by these additional listings:
@jacobvosmaer @jnijhof @dblessing @rspeicher @ChadMalchow

\cc @sytses