Example for Orator ORM

[rmk135]

Idea of this issue is to create an example on how to use Dependency Injector with Orator ORM.

Originally, this question was brought in #230.

Acceptance criteria:

• There is an example mini application showing how to use Dependency Injector and Orator ORM
• Mini application demonstrates benefits of using Dependency Injector and Orator ORM
• Description of that mini application is published in Examples section of Dependency Injector docs

Links:

• https://orator-orm.com/
• http://python-dependency-injector.ets-labs.org/examples/index.html