libsmartcols: add a missing function

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
libcommon: export fputs_{quoted,nonblank} from libsmartcols

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
libsmartcols: clean up the API

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
libsmartcols: rewrite the internals to use structs as cells

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>
libsmartcols: add color support

Signed-off-by: Ondrej Oprala <ooprala@redhat.com>