Getting rid of the old dropdownmenu css

moving the necessary parts into main.css
Fixing some of the indenting in night.css
Remove dropdownmenu.css from html template
Fixing grunt watch task
Updating build doc with new info
Adding ability for grunt to run up a webserver

makes life simpler so there's no remembering what the python simple
server flag is
Merge pull request #194 from rumblesan/menu-cleanup

CSS cleanup by Guy John ( @rumblesan )
Merge pull request #195 from rumblesan/grunt-server-task

Adding ability for grunt to run up a webserver by Guy John ( @rumblesan )
Merge pull request #196 from rumblesan/build-doc-update

Build doc update by Guy John ( @rumblesan )