Move several scenarios to new homes
Remove scenario that's tested elsewhere
Extract `-r` scenario into new feature
Extract @-notation to new home in new features
Made steps more like those in rerun_formatter

We are trying to standardise on one set of example steps within the
whole codebase, to clean up the docs.
Added @spawn to fix build failure
Merge pull request #467 from chrismdp/cucumber-cli-dissection

Start dissection of cucumber-cli.feature