Run details page will now print out an error report when a run is failing or has failed.  Removed an issue with email input where a user would enter a value and then erase that value, leaving the field blank.
Merge branch 'master' of https://github.com/pegasus-isi/pegasus-gtfar

Conflicts:
	pegasus/gtfar/dax/dax.py
	pegasus/gtfar/views.py

Changed Error report to be a tab instead of a standalone section of the page