Clone the options object before referencing it in enhancedFn so that it can't be overwritten later by other route configs.
Added ability to configure default record limits for blueprints.

Use `sails.config.blueprints.defaultLimit` for general record limits.  This also serves as the default limit for populated associations.
Use `populate_limit` in your route config options to set the populate limit on a per-route basis.
Use `populate_[alias]_limit` in your route config options to set the populate limit for a particular association on a per-route basis (e.g. `populate_pets_limit: 10`)
Make educated guesses about options when specifying a blueprint route in `config/routes.js`

If you have a model User and a route config `'/user': {blueprint: 'find', limit: 5}` it will automatically set the model option to `user` for you, and set all the associations options.  You can specify an `associations` option manually with an array of strings representing the keys that you'd like to populate, e.g. `['pets', 'children']`.
Use options.limit for blueprint route populate limit before falling back on DEFAULT_POPULATE_LIMIT
Tests for blueprint route options.