#48 Config.pm should export $meta, $core and $site singletons

[Smith Farm]

Config.pm should export $meta, $core and $site singletons and implement an AUTOLOAD routine. This will be a nice replacement for the current clumsy get_param. We could then do, e.g.:

use App::CELL ( $CELL $log $meta $site );
if ( $meta->MY_PARAM ) { # GO! }
$meta->set(MY_PARAM, 'foobar');

[Smith Farm]

singletons implemented in 0.140, but still lack a 'set' method

[Smith Farm]

finished in 0.149