fix brace style in Feature Context
move define_custom_wp_content_dir() into step definition, since it's only used once
use @BeforeSuite hook to initialize $additional_args
change directory, instead of prepending --path
make FeatureContext->get_path() return the path unmodified
prepend './' to relative paths
pass cwd directly to proc_open() and revert changes to get_path()
split single site from multisite install steps
add 'cwd' key to FeatureContext->_run() result
add basic scenarios for wp-cli.yml
add scenario for WP in a subdir
'a custom wp-content directory'
add run cmd from subdir step definition