grib2 wind direction
new code-gen output (lic date)
Switch Travis to cartopy 0.10.0
anal_pep8
Merge pull request #956 from rhattersley/use-cartopy-0.10.0

Switch Travis to cartopy 0.10.0
New contributors to Iris.
Merge pull request #957 from bjlittle/new_contributors

New contributors to Iris.
Merge pull request #911 from bblay/anal_pep8

anal_pep8
Merge pull request #912 from bblay/g2_windspeed

Added GRIB2 wind direction translation.
Changed coord_dims to accept a coord name as well as a coord
added name_or_coord kwarg to iris.cube.Cube.coords
removed more uses of coord and name kwargs
removed redundant code in coord_dims
Fixed reliance on old coord_dims behaviour in calculus