Update karma-unit.conf.js
Refactor Angular::ActiveResource to expose Base on its API to use like:

module('name', ['ActiveResource']).provider('Class', function() {
	this.$get = ['ActiveResource', function(ActiveResource) {
		function Class() {};
		Class = ActiveRecord.Base.apply(Class);
		return Class;
	}];
});
Move ActiveResource::API to ActiveResource module
Use Angular $injector to find registered services for hasMany association
Move ActiveResource::Collection to ActiveResource module
Add Angular::ActiveResource.spec tests
Create ActiveResource.Mocks to hold mock ActiveResource classes
Add ActiveResource::Mocks::System class to simulate mock hasMany relationship
Add ActiveResource::Mocks::Sensor class to simulate mock belongsTo relationship