Mailchimp API 3.0 PHP Versions Save

The library was json serializing params expected by the Mailchimp Oauth server to be form style data.

fix was merged in #54.

Fix bug where headers were not of type array when no apikey was provided to MailchimpRequest.

Incoming Features

• Namespaced classes
• Full PSR-4 Autoloading via Composer
• Tests
• Success & Failure Callbacks
• Support for new endpoints

Breaks From Older Versions

• No non-autoloading option
• Class names and directory structure changes

• Get Auth URL Added

Adding support for two new endpoints:

--Batch Webhooks http://developer.mailchimp.com/documentation/mailchimp/reference/batch-webhooks/

-- E-commerce Stores Product Images http://developer.mailchimp.com/documentation/mailchimp/reference/ecommerce/stores/products/images/

Updating minimum required php version

-- Added user_agent

-- Adding Oauth Functionality

-- Adding API key checks