It is not needed because the new bar code reader don't put
a comma between the readings.

This redefines raw_input to return 'y' always in case of
EOF, and closes stdin so that --yes forces this behaviour
when requested to do so.

This is mostly redundant: it has to be decided by the testers
what they really want.

Needs to have a special version of raw_input to
correctly respond to EOF

This version is the one uploaded in ohwr.org at the moment of this commit.

It adds new features like --yes option, prints progress on the screen
and shows the state of the entire run.