Log Message:
1.4.5:

Version 1.4.5 adds some oft-requested features. When you're importing files,
you can now manually set fields on the new music. Date queries have gotten
much more powerful: you can write precise queries down to the second, and we
now have *relative* queries like ``-1w``, which means *one week ago*.

Here are the new features:

* You can now set fields to certain values during :ref:`import-cmd`, using
  either a ``--set field=value`` command-line flag or a new :ref:`set_fields`
  configuration option under the `importer` section.
* :ref:`Date queries <datequery>` can now include times, so you can filter
  your music down to the second.
* :ref:`Date queries <datequery>` can also be *relative*. You can say
  ``added:-1w..`` to match music added in the last week, for example.
* A new :doc:`/plugins/gmusic` lets you interact with your Google Play Music
  library.
* :doc:`/plugins/replaygain`: We now keep R128 data in separate tags from
  classic ReplayGain data for formats that need it (namely, Ogg Opus). A new
  `r128` configuration option enables this behavior for specific formats.
* The :ref:`move-cmd` command gained a new ``--export`` flag, which copies
  files to an external location without changing their paths in the library
  database.

There are also some bug fixes:

* :doc:`/plugins/lastgenre`: Fix a crash when using the `prefer_specific` and
  `canonical` options together.
* :doc:`/plugins/web`: Fix a crash on Windows under Python 2 when serving
  non-ASCII filenames.
* :doc:`/plugins/metasync`: Fix a crash in the Amarok backend when filenames
  contain quotes.
* More informative error messages are displayed when the file format is not
  recognized.