The easiest way to develop the library is to run npm run example and hack away (the demo app is in example/)
This works without having to setup a separate project with npm link, since it references the local code directly via the lib/Lib alias.
In this way, you can see the live changes while developing, without cluttering the library build with the examples's dependencies :)
You can also build the library and run tests via the usual commands in the root folder (npm run build, npm run test, etc.)