klomp-info: make default==all colnames explicit
klomp-info: add non-default extra colnames
klomp-info: parse the klomp cur/playlist info up front
klomp-lib: reorder sub prototypes
klomp: pull get-song-absolute-path from klomplayer => Klomp::Lib
klomp-info: add optional column 'file' to print the absolute path