wavbreaker 0.12

Here it is, the refreshed release of wavbreaker for Linux, BSD, macOS and Windows:

• Redesigned interface based on the GNOME 3 UI
• Upgrade toolkit from GTK+2 to GTK3
• Switch from GNU autotools to the Meson Build system
• Support for opening and cutting MP3 files using mpg123
• Single, cross-platform audio output based on libao
• Fixed Moodbar support (for newer versions of the utility)
• Improved mouse interaction with the sample waveform display
• Support for CUE sheet export
• New wavgen utility to generate test files
• Drop dependency on libxml2, use GKeyFile from glib
• Support for cutting very long (longer than 9 hours) MP3 files
• Port rendering code from GdkPixmap to Cairo
• Updated translations: French and Portuguese