Checkpoint.

* Add a .htaccess file that does the rewrites, instead of in the httpd
  confile file. Added Rob's stuff for rewriting urls to hide the .php
  although not sure this is working correctly yet.

* Add simple MyExperiments page so that logged in users can find their
  way back to running profiles.

* Move the DB table holding the running experiment records from the
  geni-sa DB into the main Emulab DB. Lots of little changes for that.

* Change logout to plain link instead of ajax call. That was a silly
  thing to do.

* Bug fixes to ssh keys and shell login from the status page.