Log Message:
Update to 1.06

Upstream changes:
1.06   2013-12-31

- DateTime's attempt to generate infinity by calculating 9**9**9 actually got
  a number on some platforms, like powerpcspe. Reported by Gregor Hermann. RT
  #91696.

1.05   2013-12-22

- Added a new CLDR ZZZZZ specifier, which is like ZZZ but inserts a
  colon. Patch by Ricardo Signes.

- Added a new option for the truncate() method to truncate to the
  "local_week". This truncates to the locale's notion of the first day \ 
of the
  week, rather than always truncating to Monday. Patch by Christian Hansen.

1.04   2013-12-07

- Calling set_locale() or set_formatter() on an object with an ambiguous local
  time could change the underlying UTC time for that object. Reported by Marta
  Cuaresma Saturio. RT #90583.