Changelog 0.8.7x

Adapter definitions are no longer functions-- instead the direct definition object is accepted. This makes it easier, cleaner, and more declarative to create adapters.
Merged waterline into main Sails repo.
Brought in sails-util and sails-moduleloader, moved watelrine tests into top level.
Attribute values in models in result sets from Waterline are now cast to numbers, if they are number-looking strings.
Substantial refactoring of waterline model-augmentation logic.
Added TODO for asynchronous module loading for future.
Upgraded waterline-dirty dep.

Patch updates the waterline-dirty dependency to deal with an issue with that adapter returning objects which map directly to the in-memory database (was causing changes made to found models to be persisted without calling .save())