Removing mesecons

- For some merge failure reasons, I've chosen to remove it and add it again.

Signed-off-by: LeMagnesium <mg.minetest@gmail.com>
Adding again mesecons
- It's an easier way to update it than to copy the files over the old ones..

Signed-off-by: LeMagnesium <mg.minetest@gmail.com>
New tewtures for sheep and cow
- New texture for mobs:cow
- New texture for mobs:sheep

Signed-off-by: LeMagnesium <mg.minetest@gmail.com>