Priority:
 - KEY_RESIZE on short file freeze
 - cygwin arrow keys return different key codes?

Maybe one day:
 - Replace
 - Cut/Copy/Paste
 - Undo
 - Config (~/.shedrc) to set things like hex mode by default.m
 - Make offset more readable
 - Fix search in /dev
 - jump to %
 - highlight every nth line (colors!)
 - Toggle whether file is treated as signed or unsigned chars.
