Added Greek translation
corrected the track names and erroricon display

	deleted:    0001-fixed-the-height-of-the-headerbar.patch

https://bugzilla.gnome.org/show_bug.cgi?id=704253
Remove tests

Tests for Gnome Music were useful on early stages of development, but now they are:
 a) hard to maintain
 b) test only insignificant minimum if functionality
 c) quite useless without CI or constant control

Good night, sweet prince
Only allow left-button click to trigger events

By design we don't want that {right,middle}-button click triggers
any kind of action in gnome-music.

https://bugzilla.gnome.org/show_bug.cgi?id=700539
Port media art storage functions from tracker

Port normalizeAndHash, stripFindNextBlock and stripInvalidEntities from
tracker to ensure that our media art matches tracker's extracted data.

https://bugzilla.gnome.org/show_bug.cgi?id=703475
Use filename of tracks as title if not available

https://bugzilla.gnome.org/show_bug.cgi?id=701427
fix for undiscoverable urls.

https://bugzilla.gnome.org/show_bug.cgi?id=704253
patch for ui fix in artistalbums.

	deleted:    data/Unsaved 1.glade

https://bugzilla.gnome.org/show_bug.cgi?id=704254
Fix scrollbar position on albums with a long list of tracks

https://bugzilla.gnome.org/show_bug.cgi?id=704242
Add COPYING file

Update source file license and copyrights (fixed typo)

https://bugzilla.gnome.org/show_bug.cgi?id=700776
Updated Spanish translation
Updated Czech translation
Updated Spanish translation
Port gnome-music to python3
Set correct license in COPYING file
Updated Spanish translation
Merge remote-tracking branch 'github/master'
Merge remote-tracking branch 'github/master'