Tweak Ender IO Config

Should make things a bit harder.  UseHardRecipes will be true for now to see what it does, reverting it is a possibility if it becomes unnecessarily hard.

Disabled use of AE2 panels through an EnderIO, as that's just ridiculously overpowered to access your central base inventory from anywhere by just plopping down an Ender IO next to your terminal.

Powered Spawners nerfed a bit.  Vanilla spawners only drop 75% of the time, and players can only spawn mobs when they're with 16 blocks of the spawner, and wherever they were able to spawn using vanilla spawning rules.  This should make them more of an early auto-spawner option compared to MFR's auto-spawner.