* Composer: sort packages, set full versions

* Composer: setup authors

* Phpstan: update ignored errors

* Scrutinizer: ignore .docs instead of docs

* Repo: added editorconfig to keep same style, gitattributes to skip some files in archive

* Refactoring: replace composer tests script with working command, added composer coverage script

* DataModel: allow to pass common Collection, but check for Selectable interface

* Travis: move phpstan + phpcs to quality stage, added php nightly to build matrix

* DataSource: refer LogicException directly