Made use of obvious-ci.
Merge pull request #28 from pelson/obviousci

Made use of obvious-ci.
Added the build channel to conda.
Merge pull request #31 from pelson/add_channel

Added the build channel to conda.
Add Iris recipe
Removed point-version requirement in Cartopy version
Merge pull request #32 from dkillick/iris_recipe

Add Iris recipe