Add dijit/Dialog to loader list.
Merge branch 'master' into stable
Still need to merge Sachin's logging
              fix input box
              add link to intro video
Undo bad commit on master.
Merge branch 'master' into stable
Merge branch 'master' into stable
This has a working description editor,
but node editor won't re-open for existing node
in author mode (chokes on setting the equation).
Merge branch 'master' into stable
Merge branch 'master' into stable
Merge branch 'master' into stable
Merge branch 'master' into stable
Author mode mostly working.  Still need to
work on units control.
Merge branch 'master' into stable
Merge branch 'master' into stable
Merge branch 'master' into stable
Merge branch 'master' into stable
Merge branch 'master' into stable
Merge branch 'master' into stable
Send the model task to the solutions table.
Update the solutions table using the SQL query:
  UPDATE solutions SET solution_graph = SUBSTRING(solution_graph, 9, LENGTH(solution_graph)-9)
     WHERE solution_graph REGEXP '^{"task":';
Merge branch 'master' into stable
Merge branch 'master' into stable
Bug : 2413, Make sure node is not broken when initial value is zero
forum buttons included and events attached
Sort choices in node editor.
This was copied off branch jingxian2