updated README.md and manpage
errors encountered while loading files during initialisation are shown on console before quitting
80-column listing lines: don't overwrite if consecutive
listing: clear all lines for multiline list rows
listing: clear all lines for multiline list rows
fixed wrong module for global in debug.show_program()
show cursor on the right line in EDIT gadget
position edit gadget correctly on syntax errors thrown by util.require()
README.md improvements
renamed exectpcbasic.py -> pcbasic
merged fixup branch