v0.5.0

Changes

• Added pre-emphasis status reporting to whipper's logfiles
• Whipper is now GStreamer free (removed all dependencies on it)
• Replaced rip command suggestions with 'whipper'
• Various bugfixes and improvements

Known issues

• #99 (whipper not picking up all settings in whipper.conf)
• The image retag feature has been knowingly broken since PR #130