delta count should be calculated from the in-use graph data (bugid:110578)
stored total/delta count in graph label class for testability
added short cut task for test
added specs for graph label
added blank dependencies (no side effect)
jsdoc fix
do toString if toString exists
removed unnecessary colon
move comma operation to graph_label.js
renamed a valiable to unique one
include variables into this context as same in graph_easel
added specs and blank specs planed to add
updated build files