Squashed the following commits:
5c723ad commit: Fix: Includes alpha sort
15ac350 commit: Fix: Updated Database::kSchemaVersion to 49.
767a26a commit: Fixed small code style issue. Added schema-49 to data.qrc instead schema-48
bf6aa64 commit: fixup! Modified async handling of CollapsibleInfoPane as recommended by Andreas. Display of IDv2 tag lyrics works now.
c1f97e9 commit: fixup! Added support to read/display the ID tag lyrics in MP3 files:
c946b1d commit: Added support to read/display the ID tag lyrics in MP3 files:
-Added schema to the database to store it
-Added readers/writers for ID tags
-Added readers/writers for the database to the song class
-Added the taglyricsinfoprovider to show the lyrics in songinfo
