Update Time-Piece to CPAN version 1.30

Update Time-Piece to CPAN version 1.30

  [DELTA]

1.30    2015-05-16
        - Stable release. Overview from 1.29:
        - Make strftime more portable + fix %z %z
        - Add many more tests
        - Clean inheritance

1.29_05   2015-05-02
        - Combine multiple 'use constant' statements (saves 0.5ms at runtime)
        - Don't leave c_epoch undef
        - deprecate parse() function
        - More constructor tests
        - export() calls Exporter::export

1.29_04   2015-04-09
        - Clean inheritance of Exporter and DynaLoader (Thanks dolmen!)
        - Refactor _strftime to use localtime/gmtime to generate tm struct

1.29_03   2015-04-04
        - Don't mix gmtime and mktime in _strftime
        - Clean whitespace at end of lines
        - Add more tests for DST issues and also strptime parsing

1.29_02   2015-04-04
        - Fix handling of %Z and %z in strftime (hopefully)
        - Remove compile warnings for int cast

1.29_01   2015-03-30
        - Fix handling of %Z and %z in strftime (in progress)
        - Remove unused constants from Time::Seconds (Thanks Xaerxess!)
        - _strftime: use system mktime to better support past/future dates
        - Relicense strptime as BSD 2-clause http://git.io/vfNSg