Fix autoloader configuration.
Update license year and read me.
Switch to PSR-4.
Fix PSR-4 definition.
Make autoloader smarter.
Add caching layer with initial support for Apc, XCache and Memcache.
Improve default cache settings.
Cache authentication token.
Add caching to all model methods.
Cache countries indefinitely.
Cache query results.
Begin adding phpdoc.
Add read-only accounts and tax rates.
Send unauthenticated requests.
Add support for custom arguments on methods (passing array as last argument). Useful for expanding references when browsing.
Add shipping method and shipping class models.
Improve static class documentation for autocomplete.
Bugfix in assembling cache key in browse method in conjunction with additional parameters.
Merge branch 'release/0.2.0'