Replicator fieldtype backend

[skrolikowski]

This issue is dedicated to the discussion of the back-end side of things.
Replicator is a Matrix-like fieldtype capable of having it's own set of fields.

Replicators will have their own table replicators, which:

• belongsTo originating fields record.
• hasMany Replicants (each w/ it's own replicators_{name}_uniqid())

The Fields of a Replicant are linked through each individual auto-generated Replicant model.