expose mopidy version to core API
property for get_version and documented
get_version changelog entry
docs: Unbreak docs building
docs: Include API docs for the Core class
Merge remote-tracking branch 'kingosticks/feature/expose-version-to-api' into develop
core: Test version property, fix typo in changelog
docs: Update authors
flags: use $XDG_CONFIG_DIRS and $XDG_CONFIG_HOME as defaults

This does not add support for '$XDG_CONFIG_DIRS' expansion, it just makes the
default include what it is set to.
docs: Update change log with XDG_CONFIG_DIRS change
commands: Remove print statement
docs: Fix typo in changelog
Merge pull request #615 from adamcik/feature/xdg_config_dirs

Add $XDG_CONFIG_DIRS to default config search path.
docs: Link to PyPI instead of Crate.io which has been discontinued
docs: Fix typo
docs: Update mock to support glib.get_{system,user}_config_dir{s,}
docs: Move images out of the _static dir

Sphinx copies the images to _images when the docs are built. Thus the
mopidy-docs debian package contains two copies of all images; one in _static
and one in _images. By keeping the images next to the source documents we only
get the _images copy included in the Debian package, reducing the package size
by 1.5MB.
Merge branch 'develop' of git://github.com/mopidy/mopidy into develop
Merge branch 'develop' of github.com:kingosticks/mopidy into develop