autorectify.py tighter parameter space: Restrict tau to [0, pi/8) inst. of [0, pi/4)
autorectify.py tighter parameter space: Make sure size does not diverge from [5,64] window
autorectify.py tighter parameter space: Optimize [x,aspectratio] inst. of [x,y] size
autorectify.py tighter parameter space: Fix minsize bound
autorectify.py tighter parameter space: Move minsize, maxsize to shared RectifyParams attribute
autorectify.py tighter parameter space: Tighter size bounds [5, 64] -> [12, 30]