fix(web-server): strip scheme, host and port

This reverts commit ae85c29eb68af96db7e11c7b3b2172a50cbf202c.

	modified:   lib/middleware/karma.js
	deleted:    lib/middleware/strip_host.js
	modified:   lib/web-server.js
	modified:   test/unit/middleware/source_files.spec.coffee
	deleted:    test/unit/middleware/strip_host.spec.coffee
	modified:   test/unit/web-server.spec.coffee