Mob AI improvements

[mezzodrinker]

Change the mobs' AI to achieve the following:

• Endermen no longer teleport away during the day if they have been interacted with in the past.
• Zombies and Skeletons no longer burn in the sun.

Additionally, make these changes opt-in by adding a config option to the MobTalker2 config and maybe also the Script Pack config?

Originally reported here.