tzinfo 1.1.0 on Ruby Gems

TZInfo is now thread safe. ThreadSafe::Cache is now used instead of Hash to cache Timezone and Country instances returned by Timezone.get and Country.get. The tzinfo gem now depends on thread_safe ~> 0.1.
Added a transitions_up_to method to Timezone that returns a list of the times where the UTC offset of the timezone changes.
Added an offsets_up_to method to Timezone that returns the set of offsets that have been observed in a defined timezone.
Fixed a "can't modify frozen String" error when loading a Timezone from a zoneinfo file using an identifier String that is both tainted and frozen. Resolves #3.
Support TZif3 format zoneinfo files (now produced by zic from tzcode version 2013e onwards).
Support using YARD to generate documentation (added a .yardopts file).
Ignore the +VERSION file included in the zoneinfo directory on Mac OS X.
Added a note to the documentation concerning 32-bit zoneinfo files (as
included with Mac OS X).

tzinfo 1.1.0 v1.1.0 on Ruby Gems