Update geopm(7) man page to reflect recent changes.
Update geopm(7) man page to reflect recent changes.

- Now just one report file per run broken out by host.
- The report and trace now have headers.
- The launcher wrapper is given as the recommended launch method.
- The geomp_ctl_c interface is no longer recommnded for use.

Change-Id: Ie716a3c0c14d2f16920d15fa1855b87f9a1e4bf0
Signed-off-by: Christopher M. Cantalupo <9cf3ecca60a3dd7112ab0e7250bedb8a752e3958@intel.com>

cmcantalupo/geopm,geopm/geopm,geopm/geopm,cmcantalupo/geopm,geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm,cmcantalupo/geopm