WIP FarLimitStencilsFactory

- bi-cubic patches should be mostly covered, although portions of the interpolation code
  need to be refactored out into Far::PatchTables as vertex templated functions (following
  patterns established in the Far::TopologyRefiner)

- end-cap patches still have to be done (prob. going to drop Gregory in favor of bilinear)

- Presto needs a fully bilinear code path (no patches) - really ???