SciTools/iris — pull request #1461 by esc24 (2014-11-26 09:43:00+00:00)
Title: Refactoring of handling of PDT in grib save code

This PR (hopefully) simplifies the code layout in `iris.fileformats.grib._save_rules` for the handling of he product definition template. It adds functions for each PDT number and removes some layers of complexity.