Better handling of the user environment
Better handling of the user environment

A backup of the user environment is now taken during a call to start
instead of during the launch of the task. This allows for changing the
user environment when the express server is run using nospawn (as with
grunt-contrib-watch).

ericclemmons/grunt-express-server,y-a-r-g/grunt-express-server,Brother-Simon/grunt-express-server