wit-ai/duckling — pull request #15 by obscurerichard (2014-10-05 05:59:55+00:00)
Title: Added support for "hence" as an English date modifier

This pull request adds support for the archaic English date modifier [hence](http://www.merriam-webster.com/dictionary/hence), the inverse of [ago](http://www.merriam-webster.com/dictionary/ago).