### Breaking Change
- [X] `Mobile.GetOldPacketFlags()` no longer exists. Instead there is a flag for `Mobile.GetPacketFlags()`.
### Non-Breaking Changes
- [X] Consolidates move to world for mobiles
- [X] Consolidates mobile packets between stygian abyss and older
This PR supersedes changes in #337. That PR will need to be redone and broken out anyway.