TuxGuitar 1.3 changes:

* Add show/hide toolbars feature.
* Add let ring support
* Add song templates support
* Add count down support
* Add bank selection support
* Soundfont selection support in gervill plugin
* Better support in jack plugin
* New oxygen skin
* New gpx importer plugin
* New svg exporter plugin
* New image exporter plugin
* Magic Sound Font v2.0 Contributed by Dennis Deutschmann
