TODO
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Features
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### Configurability

What configuration options should be available?

* Debugging?
* Default message overrides?


Testing and Compatibility
-------------------------

* Formidable and Connect-Form
* Do not assume data is a String. May need to drop `node-validator` dependency.


Other
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* **Async validation (for databases, etc)**
* Add notes on how to extend the filters and validators
* Change node-validator toUppercase/toLowercase to use standard JS caps: toUpper**C**ase, toLower**C**ase.