autoLink adds inappropriate attributes

[ded]

twttr.txt.autoLink('hello http://twitter.com', {
  , usernameClass: 'custom-user'
})

outputs:

hello <a href="http://twitter.com" usernameClass="custom-user" >http://twitter.com</a>

[mzsanford]

Fixed with c3b5f1e which will be in the next release.

[ded]

yeeeeeeeah. thanks matt