Add NRAO SIW Conference Directories

Add /var/nrao owned to the demo1 account for the SIW Conference

From kscott:
We would like a /var/nrao directory created on each Linux machine in
these rooms.  The directory permissions should be 0777 and owned by
the demo1 account.
Merge pull request #8 from NMTCC/nraodirectory

Add NRAO SIW Conference Directories