Update README.md
Hide URLS by default in environments list (so it's not too wide).
Add --yes and --no options, replacing --no-interaction.

Replace 'dialog' with 'question' throughout.
Merge branch 'envs-hide-urls-by-default' of git://github.com/pjcdawkins/platformsh-cli into envs-hide-urls-by-default
Support Sf2-style option specs. Resolves #143 yay.
Merge pull request #123 from pjcdawkins/yes-no

Add --yes and --no options, replacing --no-interaction.
Merge pull request #134 from pjcdawkins/update-readme

Update README.md
Update README.md
Merge branch 'envs-hide-urls-by-default' resolves #143