misc: add contributor in README

Related to #36

README.md

@@ -35,7 +35,7 @@ Files with contributions (or unclear license info):
 * [js.jsf](https://github.com/cmur2/joe-syntax/blob/master/js.jsf) which is created by [Christian Nicolai](https://github.com/cmur2) and then modified by [Rebecca Turner](https://github.com/iarna) under GPL v2 or any later version and compatible ISC license ([comment](https://github.com/cmur2/joe-syntax/pull/13#issuecomment-78058267))
 * [json.jsf](https://github.com/cmur2/joe-syntax/blob/master/json.jsf) which is entirely contributed by [Rebecca Turner](https://github.com/iarna) under GPL v2 or any later version and compatible ISC license ([comment](https://github.com/cmur2/joe-syntax/pull/14#issuecomment-78058037))
 * [lsl.jsf](https://github.com/cmur2/joe-syntax/blob/master/lsl.jsf) which is from [Zai Lynch](https://wiki.secondlife.com/wiki/User:Zai_Lynch) under GPL v1 (delivered by [Rebecca Turner](https://github.com/iarna))
-* [md.jsf](https://github.com/cmur2/joe-syntax/blob/master/md.jsf) which is created by [Christian Nicolai](https://github.com/cmur2) and then modified by Jonas Rosling
+* [md.jsf](https://github.com/cmur2/joe-syntax/blob/master/md.jsf) which is created by [Christian Nicolai](https://github.com/cmur2) and then modified by Jonas Rosling and [Todd Lewis](https://github.com/utoddl)
 * [powershell.jsf](https://github.com/cmur2/joe-syntax/blob/master/powershell.jsf) which is entirely contributed by [Oskar Liljeblad](https://github.com/osklil) under GPL v2 or any later version ([comment](https://github.com/cmur2/joe-syntax/pull/5#issuecomment-76935968))
 * [puppet.jsf](https://github.com/cmur2/joe-syntax/blob/master/puppet.jsf) which is created by [Christian Nicolai](https://github.com/cmur2) and then modified by [Eric Eisenhart](https://github.com/eeisenhart)
 * [sql.jsf](https://github.com/cmur2/joe-syntax/blob/master/sql.jsf) which is from an "unknown source" (delivered by [Rebecca Turner](https://github.com/iarna))