Standard README and Style Guide

[EternalDeiwos]

To maintain a standard style across our repositories and to aid new contributors, I propose that we add EditorConfig files to our repositories and make a note of it in our READMEs.

Most editors (vim, Sublime, Atom, VSCode, etc.) have plugins for EditorConfig making it relatively easy to automate tab indentation size, UNIX line-endings and ensure that files end with a new line.

Please see the @trust/model README and .editorconfig file for the proposed configuration.