Arbitrary document keys

[Chad Engler]

Right now a schema is assumed to use _id as the main key. This should be configurable, any field should be able to be the key for a schema, including a custom prefix:

var siteSchema = new kouch.Schema({
      ip: { type: String, key: true, prefix: 'site:'},
      name: String,
      url: String
});

If no field is marked as key then _id should be added and used. If a field is marked as the key is should only be automatically generated if the auto: true property is set.

[Chad Engler]

In progress on feature-custom-keys

[Chad Engler]

Merged!