Update config.yml

Changed quite a few limits but most of them i kept at the same ratios between limit and range just lowered them together. The ones that i did change the ratios on are to get the spawner mobs culled down some as there were comments that spawners were getting a little crowded. The reason for changing the other ones is to hopefully help server performance. The range is actually a radius so most of the limits were searching 30 blocks in every direction around each mob to calculate which mobs to cull, these changes will cut down on the number of calculations and hopefully improve server performance. I also changed the mob player multiplier on a trial basis.