emacsclient: --quiet/--verbose

[Michael Mauger]

As I've moved over to emacsclient from gnuclient, I've found a couple of areas 
where it's behavior is awkward, although not wrong per se.  

This patch adds:
* a --quiet option to suppress informational messages from emacsclient
* In emacsclientw, defaults to --quiet and --no-wait
* adds --wait and --verbose options to override the defaults in emacsclientw

If it's deemed to be too late in pretest for these that's fine, but this is a 
small change and leads to better interaction.

ec-quiet.diff
Description: Text document