https://www.linkedin.com/in/mitchellh/
Or are you saying that he's not the author? Commits seem to suggest otherwise.
commit fb9c58f0e20a85a5358142ddb39a2f74d3bbe69b
Author: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Fri May 23 11:03:38 2014 -0700
config: better error message
commit 089822a36f0a5e4c583ab401b7496b48bfa31d65
Author: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Fri May 23 10:52:19 2014 -0700
config: some comments
commit ec3f72703c82f50787ef86498d856a5798900ad8
Author: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Thu May 22 16:56:28 2014 -0700
Initial work on config
commit 649cf336e86da10910f6e50ea3cfaad507a2e336
Author: Mitchell Hashimoto <mitchell.hashimoto@gmail.com>
Date: Wed May 21 16:28:53 2014 -0700
Initial commit