Log Message:
Updated p5-DateTime-TimeZone to 2.00.

2.00    2016-06-07

- The fix in 1.99 broke the parsing of the etcetera zones, which are specified
  as 1 or 2 digit offsets in hours, unlike all other zones which are written
  as "1:00" or "-2:00".

1.99    2016-06-07

- When parsing the POSIX zones in the etcetera file, don't special case the
  ETC[+-]NN zones. These are weirdly named, as ETC+8 is 8 hours _behind_ UTC,
  and -6 is 6 hours _ahead_. Previously, we were swapping these so the name
  matched the sane usage, but this is confusing for anyone who is explicitly
  trying to use the POSIX names, expecting the bizarre (but POSIXly correct)
  interpretation. Patch by Bron Gondwana. GitHub PR #7.