working with the exercise on realtime chart using d3.js.
Merge branch 'master' of https://github.com/3rdstage/exercise.git

Conflicts:
	thirdstage.exercise.javascript/src/main/webapp/pages/exercise/d3/D3Exercise13.html
	thirdstage.exercise.javascript/src/main/webapp/pages/exercise/javascript/JavaScriptExercise3.html