Experimenting with differing dimensionalities

Removed some outlier fonts (from 10658 to 9417 examples) after the fact
(should exclude them from generation). It seems that if k is more than
one below the “natural” value, the results are very bad. 12x12 images
seem to provide a good speed/accuracy balance (at least for performing
further experiments)
k limit should have a min of 1

.. and the max value should be the same as the width instead of one
minus it
Improve test char cropping
Remove dead code
Quiet
Add debug verbosity switches
Change the shape of character representations

Instead of filling the square they are scaled to fit, preserving the
aspect ratio
Change character shapes
Change file mode?
Change how images are handled

Increase back to 16x16 thumbnails, changed how test images are scaled,
remove the imagespace mean reduction