Merge pull request WP-API#8 from WP-API/sync-wp-core-35691

Sync with WordPress core as of r35691

Add a composer.json

Version 2.0 beta 4: "See My Vest"

Version 1.2.3: JSONP XSS Security Release

Bump version to 2.0-beta3

Bump plugin version to 2.0-beta2

Add Changelog entry and bump version to 2.0 Beta 1.1

Add Changelog entry and bump version to 1.2.2

Add 2.0 Beta 1 changes to CHANGELOG.

Update changelog; bump version to v1.2.1