Log Message:
Version 1.5 (November 4th, 2016)

**Backwards incompatible changes**
- clean: The list of ``ALLOWED_PROTOCOLS`` now defaults to http, https and
  mailto. Previously it was a long list of protocols something like ed2k, ftp,
  http, https, irc, mailto, news, gopher, nntp, telnet, webcal, xmpp, callto,
  feed, urn, aim, rsync, tag, ssh, sftp, rtsp, afs, data.

**Changes**
- clean: Added ``protocols`` to arguments list to let you override the list of
  allowed protocols. Thank you, Andreas Malecki!
- linkify: Fix a bug involving periods at the end of an email address. Thank you,
  Lorenz Schori!
- linkify: Fix linkification of non-ascii ports. Thank you Alexandre, Macabies!
- linkify: Fix linkify inappropriately removing node tails when dropping nodes.
- Fixed a test that failed periodically.
- Switched from nose to py.test.
- Add test matrix for all supported Python and html5lib versions.
- Limit to html5lib ``>=0.999,!=0.9999,!=0.99999,<0.99999999`` because 0.9999
  and 0.99999 are busted.
- Add support for ``python setup.py test``.