First ideas
Added MixedSpawnArea

To save server resources, a mixed spawn area can consist of dynamic
groups and lair  groups. Also the minimal distance from dynamic group to
nearest lair will be kept to prevent lairs and NPCs too close together a
bit more.
Placed more Lair areas on dantooine

Replaced most dynamic mob spawn areas on dantooine with mixed spawn
areas that spawn lairs and dnamic groups.
Merge pull request #702 from CharonInferar/MixedGroup

Filled dantooine with more lair groups