Switch php-cli-tools to latest release in preparation for 0.17.0
List available core translations
Throw an error for the whole command if < WP 4.0
Merge branch 'require-wp-version' into lang-command
Install a given language
Switch to php-cli-tools v0.10.1

See https://github.com/wp-cli/php-cli-tools/releases/tag/v0.10.1
Test latest version of WP, now 4.0
Use `try` for `STDERR`
Another test
Standardize on `obj_type` for consistency
Use `wp_get_installed_translations()`, which allows us to pass the type
Defer to `wp_get_installed_translations()`
Uninstall command for core language
Rename to `wp core language`
Remove some copy and paste
Command to activate a core language
Mimic core's behavior of preventing orphaned terms for all versions
Update orphan term test to get around core's new check for parent
Merge pull request #1384 from wp-cli/test-40

Test latest version of WP, now 4.0
Merge branch 'master' into lang-command