Documentation needs trivial example

[edthedev]

An additional example is needed in the documentation of the simplest possible API:

This example should include:

• A trivial 'no authentication' auth setup
• Just one or two database tables

[edthedev]

Here's something.

https://github.com/edthedev/eve-sqlalchemy/blob/master/examples/trivial.py

[amleczko]

Fixed in #19