Log Message:
Update to 1.6700

Upstream changes:
1.67     2016-03-31

- Fixed a regression introduced in 1.60. Older versions of this library would
  match dates pretty match anywhere in a string, so "%Y-%m-%d" would \ 
match a
  string like "abcd1234-12-30efgh". This is probably _too_ permissive, \ 
but we
  definitely want to match on word boundaries so that we match
  "log.2016-03-31". Based on a PR from YASUTAKE Kiyoshi. GitHub #3.

1.66     2016-03-27

- Added a zone_map constructor argument. This lets you supply a mapping for
  ambiguous time zone abbreviations. Based on a patch from Douglas Wilson. RT
  #74762.

1.65     2016-03-15

- Updated zone short name parsing to handle names like "+07", which were
  introduced in the latest IANA time zone database release.