add support for a generic query

This adds the option to pass a 'q' query item to your rest controller to easily search through all fields. It could probably be improved to omit the 'id' field, but I thought it'd be better to start to conversation here.

In order to support using Sequelize.or and Sequelize.and, it is now required to pass your instance of Sequelize in to the init function for epilogue. This removes the need for a dependency on sequelize in epilogue and paves the way for deeper sequelize integration in the future