Make message.to_s output more dig-like. Add tc_message.rb and refer to ...

...it in ts_offline.rb.

 Whitespace changes by editor include stripping white space and 2 indentation levels for line continuations.

Note: I've left the old behavior in methods named old_to_s, but if you're ok with the new to_s, I should probably delete the old_to_s methods unless you think they would be useful to someone.