add --activate param to `wp core language install --activate`
add en_US to the list of languages
make it possible to activate en_US language
Add functionality to filter list of languages
add missing new line at end of file
remove empty line added by mistake
improve test for `wp core language --<field>=<value>`
remove underscores from methods names
WPorg API returns names with HTML entities. We can decode for CLI.
PHP magic methods, except `__invoke()`, aren't valid WP-CLI commands

PHP reserves `__` prefix for magic methods. Don't use function names starting with `__` unless you're using magic methods.
Merge pull request #1435 from wp-cli/fix-1435

Unencode plugin names when installing
Limit `wp core language list` output by fields
Merge pull request #1423 from wp-cli/fix-1423

__destruct recognized as a command
Merge pull request #1404 from wp-cli/language-fields-1404

Get the currently active language
Merge pull request #1412 from rodrigoprimo/language-install-activate

Add `wp core language install --activate`
Formatter: Gracefully handle items with objects / arrays as values

We've been preflighting the data to `json_encode()` each time. This is unnecessary.
`wp <object> get` should support limiting output based off `--fields`

Adds support to `wp post`, `wp comment`, and `wp term`. `wp user` already had it.

Unlike `wp <object> list`, `* get` defaults to all object fields.

Adds `--format=csv` to `* get` as well.
Safely handle supplied iterators
Update post_content from a file or `STDIN`
Merge pull request #1377 from wp-cli/formatter-json-fields-1377

Formatter should gracefully handle objects with arrays