New Feature: Scheme for data

[timothymarois]

Ability to set a scheme for the database. Similar to the validate system, but only allow a specific scheme format to enter your data. This would allow you to maintain consistency with your database. And become closer to a traditional scheme database setup.

There should be two options loose and strict schemes.

• loose which allows you to add additional data to the database that is not part of the scheme format.
• strict which only supports data that belongs to the desired scheme format, and preventing non-schemed data from entering the database.

The scheme should be set up with the database config, and all documents created under that must support the scheme.