amoyiki

Fix #163: Some fixes in documentation and add auth example

3

this is my first pr in github:)

some thing is missing in documents

2

I want to run [Authentication example](http://eve-sqlalchemy.readthedocs.io/en/latest/tutorial.html#authentication-example) code with python3, but not work and raise ` Unicode-objects must be encoded before hashin` ``` python def encrypt(self, password): """Encrypt password using hashlib...