Bye bye dev env

There is no longer a development environment containing dependencies external to the actual web app.
Hence, if you want to do proper integration testing with either the 'gogoduck.sh' shell script, and/or email notifications, these will need to be setup manually.

Note that 5b3d99b is a refactoring cherry-picked across from an as yet un-merged branch, but it made sense for me to include it here.