Issue #54 - Use host info from referer request hdr

Use host info from referer request header
Merge pull request #61 from daveegrant/master

Issue #54 - Use host info from referer request hdr
Issue #62 - Added email notify on new comment

Created email notification when a new comment is added to a demo.
Merge pull request #63 from daveegrant/master

Issue #62 - Added email notify on new comment
Issue #62 - Common util for referring host

Added common utility to determine referring host to replace duplicate
code.
Merge pull request #65 from daveegrant/master

Issue #62 - Common util for referring host
Fixed #51: Track bug assignments

Add a control to the demo page to assign a new or open bug to a
demo-cat user.  Introduces a new ML REST endpoint to return the list of
users.  Uses a customized version of the allmighty-autocomplete Angular
directive.