Removed daemon options
Finished off man page

and added man page to the doc target of the Makefile. Also did some more
work on the admin pages and renamed production.ini to picroscopy.ini
Read configuration from system and user sources

Several configuration files are now read - system wide (/etc,
/usr/local/etc), user (~/.picroscopy.ini) and an explicit command line
specified config. Configuration reading and logging config are split
into individual methods - still need to document all this...