possible fix for issue #1185

[kagesys]

Thanks for making a pull request to converse.js!

Before submitting your request, please make sure the following conditions are met:

• Add a changelog entry for your change in CHANGES.md
• When adding a configuration variable, please make sure to
  document it in docs/source/configuration.rst
• Please add a test for your change. Tests can be run in the commandline
  with make check or you can run them in the browser by running make serve
  and then opening http://localhost:8000/tests.html.

[jcbrand]

Hi @alanrevans, your commit d03884f looks indeed like it fixes #1185. Thanks!

I looked at the logs provided in that issue and the roster push IQ stanza includes a from attribute. My own XMPP server doesn't, which is why this bug eluded me.

I've manually merged that commit.

Did you also intend to include the other two commits in this pull request? If so, can you please explain the rationale for each?