Merge pull request #41 from railsware/feature/new-api-func-2

[3.3.0] Add Email Sending Suppressions

Merge pull request #39 from railsware/feature/new-api-functionality

[3.2.0] Add Email Templates API functionality + Contact Lists API functionality

Merge pull request #38 from railsware/feature/contacts

Add Contact API functionality

Merge pull request #37 from railsware/feature/change-symfony-laravel-…

…integration

Change Symfony&Laravel integration naming [BC BREAK for Symfony&Laravel]

Merge pull request #36 from railsware/feature/update-php-http-library

Use psr/http-factory instead of php-http/message-factory and small updates

Merge pull request #35 from railsware/fix/fix-custom-email-headers

Add name prefix into custom EmailHeaders to avoid conflicts with reserved names

Merge pull request #31 from railsware/feature/improve-bridge-docs

Add more template examples in Laravel/Symfony docs

Merge pull request #30 from railsware/fix/symfony-mailer-test

Fix broken Unit tests after symfony/mailer update

Merge pull request #29 from railsware/fix/template-variables

Issue-28 > support more types in template_variables

Merge pull request #27 from railsware/feature/v.2.0.0

Upgrade SDK v.2.0 [BC BREAK]