Enable stickler-ci about esmvaltool

[axel-lauer]

I just enabled stickler-ci access. Have fun!

[markstory]

If you run into any issues getting stickler-ci going, let me know 😄

[bjlittle]

Ping @ESMValGroup/esmvaltool-developmentteam

[bjlittle]

No doubt we will need a .stickler.yml file to exclude and ignore the files and directories that require not to be checked.

This kinda forces the coversation forward with regards to sensibly restructuring the repo hierarchy for different source code i.e. R, Python and ncl @nielsdrost

[bjlittle]

@veyring also see http://mark-story.com/posts/view/introducing-stickler-ci for context

[bjlittle]

Ping @axel-lauer, could you please enable stickler-ci for the repo.

It's easy. Login to stickler-ci using your github account, allow the site to access your github metadata, then simply check the tick box against the ESMValGroup/ESMValTool repo. Bosh. Job done! It'll be 30 seconds of your day well spent!

Then we get to leverage all the lovely stickler-ci lint and pep8 yummy goodness as a service on all pull-requests. What's not to like? Komm schon! 😉

[bjlittle]

@axel-lauer if you do enable stickler-ci, could you please ping me or close this issue, then I can spin a .stickler.yml file. Thanks.