Ender Mod

New things related to the end!

By now the mod adds:

- A new dimension.

- 3 new mobs (Ender Spider, Ender Zombie and Ender Creeper.

- A new block to create the portal to this dimension and an activator for the portal.

- A new fluid like water in the dimension.

Soon I'll add more things to the mod (new boss, food, armor, tools and more!).