Timezone data: Update to 2015a

Timezone data: Update to 2015a

Timezone information is updated to 2015a, released on 30 Jan 15.

I used build/zoneinfo2lua.pl to pull data from my Ubuntu 14.10.

Changes are rather small:
http://mm.icann.org/pipermail/tz-announce/2015-January/000028.html

The Mexican state of Quintana Roo, represented by America/Cancun,
will shift from Central Time with DST to Eastern Time without DST.

Chile will not change clocks in April or thereafter; its new
standard time will be its old daylight saving time.
This affects America/Santiago, Pacific/Easter, and Antarctica/Palmer.

Ps. I manually edited headers to have the shorter new copyright,
instead of the long one generated buy the script.

Signed-off-by: Hannu Nyman <hannu.nyman@iki.fi>