Updated py-vdirsyncer to 0.14.0.

Version 0.14.0
==============

*released on 26 October 2016*

- ``vdirsyncer sync`` now continues other uploads if one upload failed.  The
  exit code in such situations is still non-zero.
- Add ``partial_sync`` option to pair section. See :ref:`the config docs
  <partial_sync_def>`.
- Vdirsyner will now warn if there's a string without quotes in your config.
  Please file issues if you find documentation that uses unquoted strings.
- Fix an issue that would break khal's config setup wizard.

(wiz)