Feature Request: Support Drag from Mail.app, etc. through URLs

[damomurf]

As per the article here: http://daringfireball.net/2007/12/message_urls_leopard_mail, if an email is dragged into NV from an application that supports application-specific URLs, it'd be great if that could automatically be inserted into the NV document as a link - I don't particularly mind whether it looks ugly, but being able to link to content from other apps would be really handy.

Essentially this is just the reverse of the Copy URL function already in NV.