Add a README

README.md

+# Frontend Toolkit
+
+## Setup
+
+```
+npm install
+npm run bootstrap
+```
+
+`cd packges/some-package` and continue development with `npm run watch` etc.
+
+## Other commands
+
+* `npm run test` -  Run test for all packages`
+* `npm run clean` - Removes all `node_modules` directories, run `bootstrap` to create them again