Vega Strike Code

Optimize particles by killing them faster

Small micro-optimization of GameUnit::Draw for out-of-view units (do not compute unneeded stuff at cam_setup_phase)

prettier fix for my screwup

universe significantUnits funcction had two issues, 1 it kept checking if our c++ function that only returns significant units was returning significant units ...dumb... and 2 it never set un back to iter.current(), yielding the same unit returned by any python call to this function

remove deprecated huge comment block out of env_map_gent, and fix up script_call_unit_generic to utilize UnitUtil functions that already exist for the purposes being used in here as a python wrapper, ensuring coherency between python and C++

options updates

Patch 3597608 by log0: Remove immediate mode from vdu. Adapted to use
VertexBuilder where beneficial (for memory safety mostly)

Tools compatible with both 2.7 and 3.x python, merge from py3 with some edits

Tweak settings to reflect computers built in the last decade ...and actually have a chance at running game

The additional versions are already searched for in current versions of cmake, the code block that was removed had to do with multi-arch setups where distros move pyconfig to an arch specific directory and have the rest of python in a common directory. this has only started to be done with 3.3. cmake hasn't yet been updated to include both dirs in it's python module yet. hardcoding these should be pretty safe whether they exist or not in the conditional. better fix would be to actually check and make sure they match the version of python found in case there are many