preparations for centric ellipse fill
hgl-zzuf-toolchain.sh recognizes referenced lua files
fixed 1 segfault out of ~100000 zzuf runs
added aspect ratio message to compile end
fixed memory leak in compiler if a file wasn't found
fixed memory leak
implemented aspect ratio calculation
in type bbox calculation implemented
prepared test case to easily create multiple test lines
moved lualib from own folder into Makefile of types
