vcs Support 0.5.1

I'm back from holidays and have released vcs Support 0.5.1. There are only minor enhancements and bugfixes this time. Nothing earth-shattering.

Enhancements:

- Now export as UTF-8, allowing ideographic characters to be exported properly (previously they exported as ANSI)
- Added it-IT, zh-CN, fi-FI, ja-JP locales
- Made compatible with latest Sunbird builds

Bugfixes:

- Now export all event times and alarm times in UTC timezone and let the calender program take care of how they are displayed (except for all day events, whose proper behaviour is not clear in the vCalendar spec)
- Fixed misspellings in ga-IE locale
- Moved options menu item to the bottom of the menu in Lightning