deleting node from dom
over riding the previous commit with change for an error in author mode
Add link to intro video on youtube via window.open
Would be nice to have dialog box with embedded?
Merge branch 'master' into megha
deleting node from canvas and model
Merge branch 'master' into megha
node handlers, functionality UI changes for author mode
Merge branch 'master' into sachin
updating model after deleting node
hack for showing the graph, changes made in initialize function
Timestamp/Description editing UI
Merge remote-tracking branch 'origin/joinerr' into sachin
Code review for delete button.
Brought model update back into main.js.  Not tested yet.
Fix bug with enable.
Use menu.add() for Description button.
Add copyright.
Some minor changes to format.
Changes for code review of Description editor
Remove global variables from description.js
Add serialize (untested).
fix css error