Standardize build tools using make
Quiet the doc and i18n scripts
Add locale to i18n script
Use PhantomJS as the headless test runner.
Refactor file upload tests
Merge pull request #492 from edx/will/standardize-build-tools

WIP: Standardize build tools using make
Merge remote-tracking branch 'origin/master' into authoring

Conflicts:
	openassessment/xblock/static/js/openassessment.min.js
	scripts/install-js.sh