the code of JDRing V2.0 ( http://www.jtheory.com/jdring.html)
I have just added the text of the file jdring.html and the contributing paragraph to the file readme.md
Merge pull request #1 from jfmelian/Version-2.0

jdring 2.0
Merge pull request #1 from jtheory/master

Update from original