Export homography template instances
Export homography template instances

The vidtk conversion library could not access these instantiations
because they weren't exported from the library.

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