* Reorganize MapEngine
This is already turning into a mess...
* Map engine selects tile index to use
Still very ugly
* Fix subtile flag combination
* Prepare randomly generated base tiles
* Restore collision viewer
* Movement works again, searches for straight paths
Paths are now d2vector slices
* Fix LOS calculation
* Fix test (I think)
* Unnecessary constructor assignments removed.
* Position implemented in d2common.Path
* Position implemented in mapEntity.Step.
* Position implemented in d2common.PathTile.
* DS1 reader no longer looks up objects
* Start of enteties managing their own equipment
* stringer and string2enum CompositeType
String2enum
* Use CompositeType stringer to simplify composite
* Finally fix GetDelimitedList
And lint issues
* NPC selects random equipment
* WIP: Add support for missiles
Break AnimatedEntity into two parts to support single and composite animations. Summon misssiles on right click.
* Break animated entity down further
Move npc only logic to npc struct, reduce duplication in map entities
* Change a bunch of int32s to int