Improve performance of running games by about 45% in nodocker mode#147

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HalfVoxel wants to merge 2 commits intobattlecode:masterfrom HalfVoxel:improve_perf

+53-41

Commits on Jan 22, 2018

Terminate bots in parallel (improves performance)
HalfVoxel
committed
Avoid searching for the process tree every tick, also some optimizations in the server
HalfVoxel
committed