Properly escape Drush args to handle spaces in file paths
Hide URLS by default in environments list (so it's not too wide).
Merge branch 'master' of github.com:platformsh/platformsh-cli

Conflicts:
	src/Toolstack/DrupalApp.php
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 branch 'envs-hide-urls-by-default' resolves #143