Now a suscribible can add a suscription by itself
Merge pull request #5 from Soluciones/suscribe-on-suscribible

Now a suscribible can add a suscription by itself
Added SuscripcionMediator to listen the ActiveRecord events and broadcast them to isolated observers
Now SuscripcionBase doesn't need to notify any observer as we are using Rails magic and a mediator.
Merge pull request #7 from Soluciones/using-rails-observers

Using rails observers
Stubbing only the methods that are called from the test
A bit more specific test
Added EVENTO_DESUSCRIBIR constant to SuscripcionBase
Merge branch 'master' into unsuscribe-updates-sendgrid
Added SuscripcionDeleteFromSendGridObserver and its tests
Added SuscripcionSyncSendGridObserver to merge SuscripcionAddToSendGridObserver and SuscripcionDeleteFromSendGridObserver
Replacing SuscripcionAddToSendGridObserver and SuscripcionDeleteFromSendGridObserver by SuscripcionSyncSendGridObserver
Merge pull request #8 from Soluciones/unsuscribe-updates-sendgrid

Unsuscribe updates sendgrid
Merge branch 'master' into unsuscribe

Conflicts:
	app/modules/suscribir/suscribible.rb
	spec/modules/suscribir/suscribible_spec.rb