Harder Zombie Survival

Added a couple of mods in, one of which added some strange but more deadly zombies, mekanism, a death counter to just rub in the pain of this modpack, and refined storage addons, so now you can make a storage drive that can hold 1 billion items! 

As for endgame difficulty, I have not been able to find any good mods for it, if someone has any suggestions or recommendations, please let me know!