Adding blogging to hoe.

Thanks to the ever-awesome Aaron Patterson (go Seattle.rb!), hoe can now blog for you. You've got to set up a ~/.hoerc file to make it work.

--- 
publish_on_announce: true
blogs: 
- user: yourusername
  password: yourpassword
  url: http://blog.example.com/cgi-bin/mt-xmlrpc.cgi
  blog_id: 1
  extra_headers:
    mt_convert_breaks: markdown

Note that extra_headers is just that, extra. This lets me post plain text to the server and apply the markdown filter to make it pretty. Everything else is required and you'll have to consult your blog doco to see what the values should be.