consistency: define app-wide coding styles and staging area

this enables semi-automatic corrections for

- unix-style newlines with a newline ending every file
- 4 space indentation (except of json files)
- staging area free of temporary and installable files
verbosity: add better README, LICENSE and initialize npm area

Both `README.md` and `LICENSE` are more placeholders for future revisions.

`package.json` is empty from modules and configuration, need to define later.