Collections, Objects and subscriptions attached to scope for automatic closing

Features

• Delete Blaze view handler on $scope destroy, thanks @barbatus - #321
• Change $scope.subscribe to $scope.$meteorSubscribe (closing the subscription on scope $destroy), thanks @maenriquez and @auterium - #323
• Add $scope.$meteorCollection & $scope.$meteorObject methods that will stop the collection or object on scope $destroy, thanks @maenriquez and @auterium - #323
• Close when scope destroys also in $scope.MeteorCollection/Object.subscribe functions - 429a0ca

Docs

• New tutorial step - Angular Material , thanks @MilosStanic
• New tutorial step - Adding 3rd party libraries, thanks @dotansimha
• New pages for Angular 2.0, Angular2.0Now and Angular-Server, thanks @simonv3 @netanelgilad @pbastowski
• More fixes, thanks @gilnis2 @ppotoplyak @cedric25 @goooseman