Curl wrapper review

[Jonas Drewsen]

Hi,

    After all the comments from last review I've refactored the curl 
wrapper and it is ready for a new review.

David Nadlinger was handling the last review so I guess it would make 
sense if he run this one as well if he wants to.

Code:
https://github.com/jcd/phobos/blob/curl-wrapper/etc/curl.d

Docs:
http://freeze.steamwinter.com/D/web/phobos/etc_curl.html

Regards,
Jonas