OurCal::Handler::CGI - the default, cgi based handler for OurCal

	my $config    = OurCal::Config->new( file => 'ourcal.conf' );
	my $handler   = OurCal::Handler::CGI->new( config => $config );

Requires a OurCal::Config object passed in as the config param.

Get the name of the view we should be using

Returns the date

Returns the user as defined by HTTP Basic Auth, cookie or user CGI param.

Get what mode we should be using

Return what header we need to print out.

Make a link out a OurCal::Span object

Get a CGI parma with the given name

Whether a link need to include a user param or not