Ensure we set the new bounds before stoping to display current root.

This makes it possible to use E key multiple time to display all
the roots. This is a little step farther in the original usage.
update help for previous patch
bump version
add explanation of program file formats
correct comment
correct explanation
fix some compiler warnings
perhaps safer without
simpler expression
add script for encoding/decoding printer codes
add header comment
more explanation
add option to enable extra warnings
use simpler approximation character
don’t output leading zeroes
use same approximation character in calculator
correct some comments
simplify subprocess calls
remove obsolete comments
forgot to document D.MS functions