Fix off-by-one bug with Kingston Mean Time.

* northamerica (America/Cayman, America/Jamaica, America/Grand_Turk):
Change KMT from -5:07:12 to -5:07:11 (should be -5:07:10.41).
* zone.tab: Fine-tune geographical coordinates to match -5:07:10.41.
I chose the latitude to match the General Post Office, Kingston,
in the city center according to Google Maps.
Replace a zone with a link when that doesn't lose non-LMT info.

* africa (Africa/Juba): Now a link to Africa/Khartoum.
* europe (Europe/Vaduz): Now a link to Europe/Zurich.

This is more likely to be correct.
Reflect Fiji DST change planned for October.

Reported by David Wheeler in
<http://mm.icann.org/pipermail/tz/2013-September/020083.html>.
* australasia (Fiji): Tweak spring-forward transitions to match
timeanddate.com's predictions.
* newtzset.3: Adjust Fiji example to match updated predictions.
Reword examples so that the English descriptions are more
consistent and are roughly in the same order as the TZ string
contents.