Move shader classes to C4DrawGL
Add PerformMultiPix method to draw many pixels at once
Remove PerformPix in favor of PerformMultiPix
Make C4EditCursor use PerformMultiPix instead of DrawPix for selection frame
Add the PerformMultiLines function

This function can be used to efficiently draw many lines
Use PerformMultiLines where appropriate
Remove C4Draw::PerformLine

It is no longer used
Add PerformMultiTris to draw many texturized triangles at once
Render all PXS in one batch (#1135)
Add test scenario for many lava PXS and smoke particles