Checkout oauth

Backend for oauth

Sets up a redirect that refers users to /checkout with a session token

Sets up a new implicit grant in oauth. If the session token is set, it will issue a implicit grant and jwt for the logged in user

Added an api that writes sendwyre user accounts to a cassandra table that uses the user's guid as a primary key.

We'll need to set the "checkout_url" to the base hostname of the checkout site.

#261 (closed)

settings.example.php

@@ -63,7 +63,7 @@ $CONFIG->site_url = 'http://{{domain}}/';
 $CONFIG->cdn_url = 'http://{{domain}}/en/';
 $CONFIG->cdn_assets_url = 'http://{{domain}}/en/';
 $CONFIG->zmq_server = 'localhost';
-$CONFIG->checkout_url = 'http://{{checkout_domain}}';
+$CONFIG->checkout_url = 'http://{{checkout_domain}}/';
 
 /**
  * Overrides default system cache path from inside data root to custom location.