Fix UnicodeEncodeErrors with some Tomboy notes
Fix UnicodeEncodeErrors with some Tomboy notes

Some Tomboy notes contained Unicode characters which need to be munged manually
to deal with a libxml2 stubbornness.

widox/snowy,GNOME/snowy,jaredjennings/snowy,syskill/snowy,leonhandreke/snowy,jaredjennings/snowy,nekohayo/snowy,jaredjennings/snowy,nekohayo/snowy,sandyarmstrong/snowy,leonhandreke/snowy,NoUsername/PrivateNotesExperimental,widox/snowy,GNOME/snowy,NoUsername/PrivateNotesExperimental,jaredjennings/snowy,syskill/snowy,sandyarmstrong/snowy