Update README with development status and error details

Update README with development status and error note

first reading from file implemented

keys to quit the superloop added

first implementation of the interactive display

hex rendering implemented; saving of dumps implemented

first renderings successful

parsing of arguments implemented; calculations of region implemented

much house keeping (build configs, ..); variables renamed

further housekeeping

first implementation of the argument parser

initial checkin - no function implemented

Enhance README with application details and art

Initial commit