Use `wp_parse_args()` where we can
Merge branch 'master' of git://github.com/wp-cli/wp-cli
Add is-installed command to wp-cli
tests: first pass at using global PHPUnit and Behat
travis: install Behat in the local build dir
replace PHPUnit assertEquals() with homegrown variant
allow to use both --locale and --version params for 'wp core download'

Ugly coded, but not so different from source. If the requested combination of locale+version is not available, the script fails like with wrong version parameter.
Tested setting it_IT and de_DE parameters and various versions.
Merge pull request #666 from MattiaG/patch-1

allow to use both --locale and --version params for 'wp core download'
fix coding standards; see #666
whitespace is nice, but let's not get ridiculous
use sprintf() instead of concatenation; see #666
replace assertStringMatchesFormat() with assertNumeric()
replace remaining assertion calls with direct exceptions
fix assertNumeric() usage
update utils/dev-build
Merge pull request #665 from wp-cli/no-dev-deps

Can't run Behat while having community packages installed
First pass at Behat test for `wp plugin is-installed <plugin>`
Fixed test for `wp plugin is-installed <plugin>`

There was extra white space in the expected output
Merge pull request #649 from joshbetz/master

Add is-installed command to wp-cli
site list: add --format=url; see #661