Update to WordPress 4.0
Update CHANGELOG
Merge pull request #100 from roots/wordpress-4.0

Update to WordPress 4.0
Merge tag '1.2.7' into 1.2.7-ja

Conflicts:
	composer.json
	composer.lock
Merge pull request #3 from omoshetech/1.2.7-ja

Update WordPress to 4.0-ja