[poe] new commits pushed by riannella

The following commits were just pushed by riannella to 
https://github.com/w3c/poe:

* Added constraint-on-constraint support. Added isNecessaryFor to 
vocab.
  by Renato Iannella
https://github.com/w3c/poe/commit/f5c9e09380b524cc6f42bcdbfbe4c7d7665eaf5c

Received on Tuesday, 24 January 2017 11:47:39 UTC