Add the EditorConfig file for consistent coding style.

EditorConfig helps developers define and maintain consistent coding styles between different editors and IDEs - see editorconfig.org for information in depth.

Signed-off-by: Stefano F. Rausch <developer@stefano.rausch-e.net>
Merge pull request #1 from StefanoRausch/master

Add the EditorConfig file for consistent coding style.