SciTools/iris — pull request #246 by pelson (2012-12-03 15:48:54+00:00)
Title: unit.py on osx

After some paired programming with @esc24 the unit module now functions across Linux and OSX 10.8 (Mountain Lion) (although there is nothing specific to that version, and it will probably work with versions far earlier).

All unit tests (i.e. those from ```test_unit.py```) now pass on both RHEL6 64 bit & OSX 10.8 with only some visual, GRIB, data and mock related tests failing in the wider test suite (that wasn't the focus of this work).

Headline from this PR: **You can now successfully install Iris on OSX Mountain Lion** (although real data testing remains to be checked).