Support omitting line numbers in output

[pekkaklarck]

I'd like to copy-paste pss output elsewhere but line numbers in the beginning of each line are on a way. Easy to remove them afterwards, but using something like --noline would obviously be even easier.

--noline would be consistent with the current --column. For consistency/symmetry reasons it might be good idea to support also --line and --nocolum.

[eliben]

Sounds like a useful feature, PRs welcome :)