csv exporter v0.1
added json download support to Exporter.
Added more plotTypes into graph presentation.
Tab presentation added.
Spreadsheet presentation added. Index.html markup updated.
new MITHgrid controllers added.
editable Table presentation added. Its a mod of the default existing presentaton
style changes
Grunt config updated.
reorganizing files. libs/ created.
app.coffee updated. [demo should be stable now]