Add comment on CLA assistant

[StephanSiemen]

No description provided.

[FussyDuck]

All committers have signed the CLA.

[StephanSiemen]

@alexamici, we should ensure that in future every contribution accepts the CLA! with this pull request the setup is done and active.

[coveralls]

Pull Request Test Coverage Report for Build 107

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage decreased (-19.9%) to 75.93%

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Files with Coverage Reduction	New Missed Lines	%
cfgrib/messages.py	2	99.38%

Totals
Change from base Build 105:	-19.9%
Covered Lines:	842
Relevant Lines:	1073

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💛 - Coveralls

[alexamici]

@StephanSiemen that's great!

Please note that the failures in Travis are unrelated to the PR (they are due to a bug in xarray==0.11.1, see #44!), and I'm not able to merge the PR because the continuous-integration checks are now required.

I don't have admin permission on the repo myself, and I assume you changed the repo settings. I'd suggest you to revert to not requiring continuous-integration to pass, as there are many reasons a maintainer may want to merge a failing PR. The license/cla must probably stay required.

[alexamici]

@StephanSiemen note also that from my home connection the URL http://claassistant.ecmwf.int:5000/ecmwf/cfgrib?pullRequest=46 times out and nmap classifies the port as filtered.