cli: add '--raw' option to list command

Add '--raw' option to the list command, in addition to proper note
expansion. Newline characters in notes are escaped to be friendly to
scripting. This option may be shortened to '-r' at the user's
convenience.

In raw output mode, the information is formatted in plain pipe-delimited
strings, one line per row:

title|system|ownership|progress|notes

ownership and progress are printed in their numeric form, consistent
with the OWNERSHIP and PROGRESS dictionaries in the vgstash package.

An empty notes field will result in a line ending with a pipe and no
whitespace following it.

0 files changed, 0 insertions, 0 deletions