New version/new name
1) renamed the plugin to KindleUnpack - The Plugin to reflect the name change to the underlying core scripts/stand-alone tool.
2) updated the underlying core scripts to the latest available version (v0.61).
3) Fixed a bug that broke things when calibre's library folder/name contained non-ascii characters (
reported by user caillou)
Now on version 0.61.0
NOTE: if you download and install the plugin manually, be sure to uninstall the old version of the plugin first (unless you
want to have two different versions of the plugin installed at the same time). Don't forget to restart after installing/updating!!