SharePoint Framework: A new breath for SharePoint development. Part 1: Date Picker

In this post I am not going to focus on how to work with SharePoint API, create a first app, and deploy it because Microsoft already prepared sample projects and documentation together with a 6-part YouTube tutorial (link : http://dev.office.com/sharepoint/docs/spfx/web-parts/get-started/build-a-hello-world-web-part). But, to say it short, I wrote how to run a created project.