Support 3rd party ORMs

[gi0baro]

This requires a compatibility layer providing common interfaces. The layer should provide for each supported ORM:

• [ ] Pipeline elements
• [ ] Auth models?
• [ ] Forms?

Involved modules (depending on the above list):

• [ ] orm
• [ ] forms
• [ ] auth
• [ ] session

[josejachuf]

@gi0baro this is giving emmett the ability to use other ORMs, eg peewee?

[gi0baro]

@josejachuf that's the idea, but at the moment it's just a plan, no idea if and when will happen :)