unit doc
Hack in pure-Python PP rules
MAINT: coord_dims speedup

This commit offers to speedup the comparison of supplied coordinate with
that on the cube by way of checking if its the same object, then
comparing by way of metadata if object not found.  This in particular
was targetting CubeList merging.
Merge pull request #587 from cpelley/merge_path

Optimise Cube.coord_dims()
Add GRIB support and fix remaining issues/tests.
Extend 1D plotting capabilities. Resolves #581.
Remove obsolete methods
Merge pull request #593 from ajdawson/plot-1d-extension

Extend 1D plotting capabilities. Resolves #581.
Add show to quickplot. Closes #607.
Merge pull request #613 from ajdawson/quickplot-show

Add show to quickplot. Closes #607.
BUG: creating coordinate from another crs copy

Currently, creating a coordinate from another using the coordinates
from_coord static method, passes the coordinate system through by
reference.
Merge pull request #614 from cpelley/coord_from_coord_bug

BUG: creating coordinate from another crs copy
Remove quickplot unit label for time reference coordinates. Closes #615.

1D plots in quickplot omit the units part of the axis label when the
coordinate it represents is given as a time reference, and hence will
have been converted to an absolute date/time.
Added function to display differences between cubes that prevent compatibility.
Merge pull request #580 from bblay/unitdoc

Tweak unit docs
Merge pull request #462 from niallrobinson/verbose_is_compatible

Added verbose functionality to is_compatible
Merge pull request #616 from ajdawson/quickplot-time-units

Remove quickplot unit label for time reference coordinates. Closes #615.
Delete temp_test_output.txt

Fix to #462.
Convert post-item documentation to pre-item #: form
Merge pull request #618 from rhattersley/docstrings

Convert post-item documentation to pre-item #: form