Integrate run script with condor defaults

I added some integration to the `utcondor-run` script with existing utcondor code.

The biggest change that might be objectionable is, by default, setting UTCONDOR_HOME to ~/utcondor (as opposed to the current working directory). I think this is ok, but others might rely on the current behavior? A quick workaround to preserve the current behavior is to put `home = '.'` in the site_defaults module, or `export UTCONDOR_HOME=.` in your shell.