grib2 wind direction
nimrod biaxial projection -1
linear mask retention

unit test

review changes

review changes

review changes

new init

license header
Updated to latests cartopy.
float64 reg coord if needed

restored pp_netcdf tests

test revert

test refactor

comment tidy
Refer travis to specific cartopy SHA.
Cartopy version dependency in INSTALL updated
new code-gen output (lic date)
Merge pull request #947 from dkillick/update_INSTALL_doc

Cartopy version dependency in INSTALL doc updated
Merge pull request #944 from pp-mo/cartopy_v10_candidate

Cartopy v10 candidate
Merge pull request #919 from marqh/maskLinearInterp

linear mask retention
ppsave test

pep8
Merge pull request #943 from marqh/testPPSave

ppsave test
Iris v1.6 whatsnew.
Merge pull request #917 from bjlittle/whats_new_1p6

Iris release v1.6 whatsnew.
Fixed issue with derived_phenomena example expecting colorbar object to
be a tuple.
Merge pull request #952 from esc24/derived_phenom_example_mpl131_support

Fixed mpl 1.3.1 issue with derived_phenomena example
Test images updated to reflect changes in MPL v1.3
Added snap=False to pcolor default args as mpl1.3 workaround
Updated license to reflect the new year