Added release notes and credits to the README
Added release notes and credits to the README

Signed-off-by: Russell Snyder <cd5d49e4d71817d0d870f02fc19163fd3c2f6d3a@redowlanalytics.com>

atomfrede/swagger2markup-maven-plugin,Swagger2Markup/swagger2markup-maven-plugin,redowl/swagger2markup-maven-plugin