boot: force windowed mode

warnings: fix `int *= float` warnings

d: prefer D-style array declarations

enemy: fix a typo from porting

FindDerelict, FindGL3N: improve module searching

shape: fix a typo

particle: fix the wake shader

stagemanager: fix a flipped argument

Merge branch 'simpler-assignments'

rand: use array.ptr

actorpool: fix index wrangling

letter: use enum as default arguments

gl3n: add division operator users

ship: replace some variables with vectors

gl3n: use vecN operators