Fixed bug with autosave not being when Node Editor
was called.  There was a race condition that was uncovered
when the controller constructor was moved in main.js
Work on the XML to JSON converter.
Work in progress for moving handlers to con-student.js
Enable/disable inputs and buttons following equation box enable/disable.
Fix bug in equation directives stuff.
If equation is demoed, still need to translate equation into
input variables and save in student model.
Still issue with conections being updated properly.
Rendering of table changed to accomodate accumulator sliders
Rendertable modification
converting equation to student readable format for PM messages, need to remove code for adding connection upon incorrect input
Add methods to determine if a parsed expression
is a product or a sum.  Add associated test page
     js/examples/parser.html
Merge with master
Remove stuff specific to Java version of Dragoon.
The most recent Java version is on the sita branch.
Undo button deletes all text in equation input.
changes in rendergraph to correct x-axis plotting error
Adding a JSON problem with no accumulators.
Merge branch 'bstrong'
Rendergraph changed to plot incomplete nodes
bug fix in previous commit for rendergraph
XML to JSON converter. In process of testing.
Merge branch 'master' into bstrong
Documentation for Graph (nodes and connectors) design.
Start documentation for node editor.