added regular and dst labels for all zones
adjusted some zones for correctness
added function to return current label for a zone
* removed a trailing space from Buenos Aires
* removed 'Greenwich Mean Time' prefix from London, since it's not always GMT
* moved Monrovia out of Casablanca into it's own zone (with Reykjavik)
* added Tripoli as its own zone, since the 2012 change
* added Ashgabat label to the Tashkent zone
s/GMT/UTC/ in labels
* changed js detectrion dates to 2012 (to pick up latest TZ changes)
* rebuilt JS map