Added the way to handle Cc/Bcc
Cleaned code
Added tests for Ccs and Bccs
Updated PHPDoc for the MailerInterface
Merge pull request #31 from Ninir/bcc

Mandrill Cc/Bcc handling
Update .travis.yml
Fixed issue when \Stampie\Identity('email_address@gmail.com') is used to create a Message but the to email does not come in the final formatted params.
Merge pull request #33 from birla/master

Fixed issue when \Stampie\Identity('email_address@gmail.com') is used to...
Disable Guzzle exception for error responses

Our HTTP client is expected to return the response for 4xx and 5xx, not to throw an exception
Merge pull request #35 from stof/patch-1

Disable Guzzle exception for error responses
Update Identity.php
Moved test Postmark class to separate file
Fixed invalid Postmark tests
Updated MailGun tests to use base tests class
Added Attachment classes
Passed message attachments to adapters
Processed attachments for mailers
Added tests for attachments
PHP 5.3 compatibility fixes
Removed isset usage