Documented the jsavcanvas class and element (closes #77)
Documented the jsavcanvas class and element (closes #77)

RJFreund/OpenDSA,vkaravir/JSAV,RJFreund/OpenDSA,RJFreund/OpenDSA,RJFreund/OpenDSA,vkaravir/JSAV,RJFreund/OpenDSA,RJFreund/OpenDSA,RJFreund/OpenDSA,RJFreund/OpenDSA