X.X-rcY -> X.X-rcZ changelog

• User interface improvements
  • blah
• System improvements
  • blah
  • blah
• PDF viewer
• Puzzles
• (N516) Music player
• Known issues
  • (N516) foo
  • (V3) bar

Full list of changes can be obtained at:

• http://openinkpot.org/timeline (tickets changelog)
•  http://git.openinkpot.org/ (User interface-related source code logs)
•  http://git.iplinux.org/ (System-related source code logs)