[Ohrrpgce] SVN: james/8808 Pathfinding: cache the dist_squared in each node, and completely remove

[subversion at HamsterRepublic.com]

james
2017-06-02 22:02:47 -0700 (Fri, 02 Jun 2017)
236
Pathfinding: cache the dist_squared in each node, and completely remove the _pathfinder_obj global

Also add a test map with 100 slimes, which currently runs about as well as the 25-slime map did before this last batch of optimizations
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U   wip/pathfinding.bas
U   wip/pathfinding.bi
U   wip/testgame/a-star.hss
U   wip/testgame/a-star.rpg