"Necropolis" - changes to creatures of levels 6-7.

I don't feel like it. Maybe it's not that important. Whatever.;)

Added 2 minutes later
Maybe I should give it to the Liches...

Added 2 minutes later
Okay, I'll try to fix the bug with the Knight's alt-grade, so that when the unit is displayed, they stand normally, not sideways.

I also need to think about increasing the damage of the Necropolis' regular abilities.