DOM componetns

Created DOM component class and instance of ComponentDescriptionFactory for every basic HTML element.

All placed in library tiles_dom.

README.md was also updated to be more actual and include build status from drone.io.
[![Build Status](https://drone.io/github.com/jakuub/tiles/status.png)](https://drone.io/github.com/jakuub/tiles/latest)

This branch continue from previous branche necessary for this functionality.