PolyStrata 0.1.42-poly.2

Fixes a crash in 0.1.42-poly.1: every start of the server stopped with NameError: name 'groups' is not defined once the engine had loaded (#8, thanks @0rand).

Nothing else changed. The engine is the same build as 0.1.42-poly.1, and the zip below is the same file.

An install from 0.1.42-poly.1 picks the fix up with UPDATE.bat on Windows or ./update.sh on Linux. A new install: download the source below or git clone the repository, then run START-HERE.bat or ./setup.sh.

What 0.1.42 brought, and how fast each model is: 0.1.42-poly.1.