World Clock Screenlet

UPDATED IN TIME FOR END OF DST IN EUROPE: Memory leak fixed (thanks whise)

A version of the default Clock screenlet with timezone support and custom date/time formats for the caption. The WorldClock screenlet automatically adjusts for daylight saving time (DST) according to rules for the selected timezone. Customizable date/time formats allow multi-line time display including seconds and timezone abbreviation (e.g., EDT, CEST) display.

Originally created to track current time in Kabul, Afghanistan from my home in Austin, Texas, USA. Kabul's offset from UTC is not an even number of hours, so the default clock screenlet is unable to display Kabul time correctly.

Released in time for end of Daylight Saving Time (DST) in the United States. True timezone support is most critical right around beginning and end of Daylight Saving Time, to ensure that the rules for the target timezone are applied and not the rules for the user's local timezone.

Based on work by RYX, whose work was in turn based on MacSlow's original cairo-clock. The default theme is nothing more than the "station" theme from RYX's Clock screenlet with the addition of a globe background.

NOTE: Requires python-dateutil package.

v 0.9.2 - removed bullet-proofing on update_timezone
added caching of tzinfo to update; for some reason, __setattr__ not being called at the proper time

v 0.9.1 - moved to cached pango_layout object to prevent memory leaks (thanks to whise)
added text alignment

v 0.9.0a - repackaged using screenlets-packager

v 0.9.0 - original upload to gnome-look.org