#1 Add optional HTTP proxy. Move configuration options to separate PHP file...

Hi Rick,

Please review and pull when you have a chance.

Full list of modifications:

* Moved settings/options to `config.TEMPLATE.php`
* Added option `HTTP_PROXY` (default: `NULL`)
* Added settings `COMMENT_TEMPLATE` and `DATE_FORMAT` - with defaults.
* Updated readme.

Tested on Apache 2.2/ PHP 5.3

Thanks,

Nick