Added Sample Featurizer and Infrastructure

Traits class added

…ch disables cmake errors

Including boost as a header only library for now (which disables cmake errors associated when compiled boost libraries can't be found)

Created DateTimeTransformer in the Featurizers folder.
Copied Jamie's DateTime code to the Featurizers folder. //REVIEW, should I remove her code from its original location?

…aturizers

  Create definitions for the first featurizer kernel.
  Add new operator domain.
  Create datetime_transformer kernel and build.
  Move OPAQUE types definitions for featurizers kerneles out to a separate cc.
  Register them with the type system.

  Make necessary adjustments to the test infrastructure to make it run
  with new types.