E2 Quats: Fixed zero division error in inv(q) and q:toAngle()
E2: Added PropCore extension (default disabled) from UWSVN
Originally by MrFaul, previous history can be viewed at:
https://github.com/wiremod/wire-extras/commits/master/lua/entities/gmod_wire_expression2/core/custom/prop.lua
To enable, run 'wire_expression2_extension_enable propcore'
Closes #215, thanks Natrim
E2: Fixed a server crash involving E:SetAngles and infinity
E2Lib: Added E2Lib.setAng(Ent, Angle) wrapper that checks for math.huge
Fixes #222
Target Finder: Minor refactor to Think timer