added authors and code block for config
Article started based on aticle by @pgrudzien12 for #633
Added dependency injection and configuration in code for asp.net 5
to replace web/app.config configuration
fixed minor formatting problems and typos, changed author sequnece, added Summary and Resources sections
fixed hyperlinks
moving migration note into own section and renaming title
reviewed ef6 article
changes from PR feedback
Erik Reitan
Rowan Miller
danroth27
Damien Pontifex