Log Message:
Update to 6.49:

Added a deprecation warning

    The TZ config variable is going away. Added a deprecation
    warning.

Some speedups for timezone handling

    Based on RT 102284, I have done some optimization of the timezone
    handling code.

Bug fixes

    Added the missing is_date base method to Date::Manip::Base.
    Mario Domgoergen.

Time zone fixes

    Newest zoneinfo data (tzdata 2015a)

Language fixes

    A number of corrections by Nicholas Riley