Merge pull request #9 from martinssipenko/master

Added branch alias for v0.x
Check packagist autohook
Use cURL extension instead of Guzzle.
Correctly handle 100 Continue HTTP status

When the server returns 100 Continue, the full HTTP response will be in
$response->body. By re-executing the parse on that body until the response is no
longer 100, we'll get the real status.
Bump version to 0.1.1
Fix #13