Fixed compound queries #9, AMD compatibility #8

This set of changes are offering the following features:

* `cake watch` to auto-compile `backbone-query.coffee` during development
* testbackbone-query-test.cofee` and `src/backbone-query.coffee` are now compatible with Coffeescript 1.3.3.
* Backbone-Query is compatible with NodeJS, CommonJS, AMD (RequireJS) and browser envronment - all of them have been thoroughly tested.
* Compounds are fixed.

This set of changes is divided in four commits, so that it's easier to see which changes were made to bring the specific feature.