Added Delete Node button to node editor
Merge branch 'master' into avaneesh

Conflicts:
	www/js/draw-model.js
reverted draw-model.js to master version
Merge branch 'avaneesh' -- adding delete node button.
Merge branch 'dillanbutler' - autofill description, bug 2559
Changed description to problem statement in  a couple more places.
Merge branch 'master' into dillanbutler