modified to permit alternate portals to run
Merge branch 'master' of https://github.com/rickmcgeer/geni-expt-engine

Enable alternate portal
enabled alternate portal
Moved slice setup variables to the config.py* files
Error page references in route_utils should now be correct.  Untested.  Fixes #17
Added utils.
Placeholder instead of prefilled value on forms.  Only works on HTML5, but not necessary on older browsers. Fixes #15