Student view for draft preview of 'describing velocity'

Fix odd Firefox incompatibility/bug

Symptom was that submission wasn't turned on when responsefield is filled
Conflicts:

	apps/smartgraphs/lib/evaluator.js

For example 66, showing json pane

Fix datasource for new annotations model

remember to serialize responseTemplates

Testing arrow coordinate calculation for different arrow types.

Make LineToAxis extend abstract base class Annotation, not Highlighte…

…dPoint

Version tested in Randolph, MA June 6, 2010