remove grunt install
add istanbul coverage tool
Add coveralls option
refactor coveralls prompt
fix coveralls prompt
Merge pull request #1 from kwakayama/master

Add JS code coverage
Merge branch 'master' into 0.4

* master:
  fix coveralls prompt
  refactor coveralls prompt
  Add coveralls option
  add istanbul coverage tool
  remove grunt install

Conflicts:
	app/index.js
	test/test-creation.js