Log Message:
py-xdg: Update to 0.26

PyXDG 0.26; February 2018

    The primary source of release files is now PyXDG on PyPI
    IconTheme: Add support for Scale and ScaledDirectories keys.
    DesktopEntry: New method findTryExec()
    Menu: More efficient processing of filter rules by building a Python AST
    Mime: Prefer the first mimetype found for a file extension, instead of the last
    Mime: Allow unknown magic-matching rule formats
    Mime: GlobDB has new methods first_match and all_matches for matching paths
    Mime: New function get_extensions to get extensions for a given mime type
    Mime: Fix MagicDB.match_data crashing with an unknown 'possible' mimetype
    Mime: Correctly handle __NOMAGIC__ rule removing previous magic matches
    Menu: XML parsing reworked
    BaseDirectory: More secure creation of a fallback runtime directory with \ 
get_runtime_dir(strict=False)
    Various miscellaneous improvements to testing.