[ci skip] in commit messages

Hey everyone,

I just noticed that travis ignores a pull request if the latest commit includes "[ci skip]" anywhere in the commit message.

This is great for commits that are intended to be squashed anyways. Otherwise, travis keeps queueing a pull request after every commit only to quit the build because of the missing "Ready for CI build" label.

Thus, I can imagine that we can make better use of our CI if we include "[ci skip]" for every commit message that would also include "SQUASH ME" or "FIXUP".

Opinions?

Cheers, Cenk

+1 for adding this to the development procedures