BUG 2411: removed extra condition
Merge remote-tracking branch 'origin/master' into avaneesh
removing object copy, using dojo.clone
added preview button
added show in student model fields to node editor
adding click hanlder to preview
Added JSON files for energy balance problems
Energy balance 1.json modified
modified node editor to add nodes to student model
Merge branch 'avaneesh' into pradeep
fix for bug 2448, changed the second message for the lastFailure2
merging master into pradeep
master merged to sachin
node links fix and expression conversion to student model.
added node status changes and adding inputs to student node
Merge branch 'avaneesh' into pradeep
Merge branch 'master' into sachin
Leader board functionality complete and tested
ui changes to dashboard documentation
changes in the sub heading of the dashboard.