Add test coverage for JavaScript

static/coffee/files.json

static/coffee/spec/calculator_spec.coffee

static/coffee/spec/calculator_spec.js

static/coffee/spec/courseware_spec.coffee

static/coffee/spec/courseware_spec.js

static/coffee/spec/feedback_form_spec.coffee

static/coffee/spec/feedback_form_spec.js

static/coffee/spec/helper.coffee

static/coffee/spec/helper.js

static/coffee/src/courseware.coffee

templates/coffee/fixtures/items.json

templates/coffee/fixtures/problem.html

templates/coffee/fixtures/problem_content.html

templates/coffee/fixtures/sequence.html

templates/coffee/fixtures/tab.html

templates/coffee/fixtures/video.html

templates/coffee/spec/histogram_spec.coffee

templates/coffee/spec/histogram_spec.js

templates/coffee/spec/logger_spec.coffee

templates/coffee/spec/logger_spec.js