Update INSTALL.md

Small revisions: added BU-353 and run.sh.
Plumb configuration section name to the top

Woops, forgot that when coded loadconf().
Get rid of eventlet to BaseHTTPSever

We weren't using the full power of eventlet anyway (in particular
forking of workers), and BaseHTTPSever permits us to migrate to
Python 3. Hopefuly.
Catch exception if status dump file is missing