Research&Implement: Use PHP-DI for Dependency Injection

[petrsvihlik]

Dependencies like typeMapper, propertyMapper, valueConverter, *Factory could be injected using DI. If we implemented DI, we could also have a default container and get rid of method such as getModelBinder.

The goal of this task is to:

• [ ] research whether using a DI framework such as PHP-DI for loading the dependencies in a library such as delivery-sdk-php is a good practice and how it could be implemented properly.
• [ ] either close this issue or implement the DI, based on the findings

Resources:

• http://php-di.org/doc/understanding-di.html
• http://php-di.org/doc/getting-started.html