Update apt-notifier.py

added Italian sections --translations still English though
Update apt-notifier-menu.desktop

added Catalan and Italian name & comment entries -- they're still English though
Update mx-apt-notifier-menu.desktop

added Catalan and Italian name & comment entries -- they're are English though
Partially added Japanese translations

Added Japanese translations for Preferences window, View and Upgrade Window, and Terminal Window
convert translation strings to unicode

prefix translation strings with a "u" to convert string to unicode
removed \xHH replacements
added remainder of Japanese translations

now that I know how to display unicode added Japanese translations for pyhton tooltip, popup and right-click menu
Update apt-notifier.py
Update apt-notifier.py
Merge pull request #1 from AdrianTM/master

latest changes that kmathern made