deleting node from dom
Merge branch 'master' into megha
deleting node from canvas and model
Merge branch 'master' into megha
updating model after deleting node
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
Remove load of calculations.js in main.js
calculations.js is extended by RenderGraph.hs and RenderTable.js
Merge branch 'master' into sachin
Description editor code review:
Handle line breaks in description
Wait until image is downloaded before getting dimensions
Handle case where no image is specified.
Cleanup image and text placement calculations.
Use <divs> to separate rows in descrption editor
(getting ready to use common style for both node editor
and description editor).
Merge branch 'megha'
Add deleter