Add skeleton code for propogating dependent types
Add skeleton code for propogating dependent types

Kitware/sprokit,linus-sherrill/sprokit,mathstuf/sprokit,mathstuf/sprokit,linus-sherrill/sprokit,mathstuf/sprokit,Kitware/sprokit,Kitware/sprokit,Kitware/sprokit,mathstuf/sprokit,linus-sherrill/sprokit,linus-sherrill/sprokit