SciTools/iris — pull request #703 by bjlittle (2013-08-16 14:17:11+00:00)
Title: Graceful identification of longitude.

The PR is a follow on from the aborted #669. See the final comment https://github.com/SciTools/iris/pull/669#issuecomment-22766373

It relaxes the identification of a longitude coordinate when it has a units value of ```degrees```, which implies rotated pole data.