Compatibility update for Symfony 4.2+

Fixed deprecated call in config

Now under Namespace "slot"

Since the company who originally hosted this package "Hipaway" does no longer exist, I decided to move it to my own namespace. Sorry for any inconvenience, just update your composer.json and you should be good to go. Please note that Tests only run under PHP7.0 from now on.

Minor improvements

• new Mandrill API signuature supported for send method
• updated servicey.yml with quoted strings

Handlebars and Optional Sender Name

• Allow using Handlebars for dynamic content
• Sender Name is now optional

Minor improvements

1. InvalidConfigurationException is now thrown if mandatory configuration params are not set (before: ContextErrorException)
2. Added getter in Dispatcher.php to get Mandrill Service

Override default Email/Sender seperately

It was not possible to override default sender name when sender email was not set manually. This is now fixed.

New: support for proxy

If your server lives behind a proxy and you want to send Mandrill messages you can now set a proxy configuration. Thanks to @Kmelia for this PR.

Message defaults

• set message defaults to null, that way account settings have precedence
• added $message->important

Minor improvements and fixes

Fixes:

• Message::merge is set to true if a value is added to merg_vars or global_merge_vars

Improvements:

• added shortcut to mark message as important Message::isImportant()
• added shortcut to set reply-to header Message::setReplyTo($email)

v1.0.3: Merge pull request #28 from bnrmth/master

Added embedded images support