Bump version number to 0.2.1
Bump version number to 0.2.1

Added in this release:

- `wp.taxonomy()` convenience method for retrieving a taxonomy object
- `wp.categories()` convenience method for retrieving category terms
- `wp.tags()` convenience method for retrieving post_tag terms

kadamwhite/wordpress-rest-api,gerhardsletten/wordpress-rest-api,kadamwhite/wordpress-rest-api,WP-API/node-wpapi,gerhardsletten/wordpress-rest-api,WP-API/node-wpapi,brad-decker/wordpress-rest-api,kadamwhite/wordpress-rest-api,brad-decker/wordpress-rest-api