Added getName() method to entities/living/meta

**The issue**
Currently there is now way to use the interface to display infos about an entity.
This PR adds a ````getName()```` to the meta interfaces, so you could do things like this.
````java
player.sendMessage("The horse you are looking at is " + horse.getHorseColor().getName() + "!");
````

**PR Breakdown:**
Added a ````getName()```` method to all entity/living/meta interfaces.