Add node_modules/vendor

This will make PR #2277 reviewable.
Merge pull request #2293 from mozilla-appmaker/pre-2277

Add node_modules/vendor
Convert designer/js/utils to commonjs

* converted the utils lib to commonjs module format from requirejs.
* replaced the implementation of `getQueryStringVariable` with a version
based on `querystring` from the node standard library.
* started a test suite.
Convert designer/js/togetherjs to commonjs
Fix leaky variable, typo'd variable name.
Convert designer/js/publishPane
Convert designer/js/editable
Convert designer/js/keyboard
Convert designer/js/modes
Convert designer/js/debugger
Convert designer/js/click
Remove unnecessary files from vendor/jquery-ui
Remove unnecessary files from vendor/colorpicker
Convert designer/js/channels
Convert designer/js/mutant
Convert designer/js/application
Convert designer/js/userstate
Convert designer/js/component-tray
Convert designer/js/index
Convert designer/components/ceci-card-designer