added `import` special keyword too
Merge branch 'master' of github.com:WebReflection/es-class

Conflicts:
	build/es-class.amd.js
	build/es-class.js
	build/es-class.max.amd.js
	build/es-class.max.js
	build/es-class.node.js
	package.json
	src/es-class.js
	test/es-class.js
using `with` instead of `import`