Update dependencies
Add CSS Inlining option to the sending API calls
Start returning the unique identifier for each message from the sending calls
Added sending options for custom tracking and SPF/DKIM signing domains.
Add auto_html option to auto-convert plain-text emails to HTML for open and click tracking
Added optional parameters to inbound/send-raw to enable SPF validation
Add important flag to messages to give a very simple boolean priority system
Add description field to webhooks
Add extra fields to templates and allow them to default for properties in messages/send-template
Add last_event_at and detail to documentation for rejections
Add API calls for rejection blacklist and whitelist management
Update templates/update documentation to treat nulls as undefined values
Add auth_key to Webhook documentation
Add data export api calls
Update the send-template documentation to make the slug parameter more explicit
Add reject reason to send calls
Add detailed error message when search services are under maintenance
Fixed typo in documentation
Add ip_pool parameter to send calls to allow manual control over routing behavior
json version isn't high enough because 1.8 came out but, really, who cares? It's json.