Log Message:
Update to 3.0612

Upstream changes:
3.0612      2016-01-09
    - Move the VCS repository to GitHub.
        - People are more used to it, and it can take part in the CPAN pull-req
        challenge.

3.0611      2016-01-07
    - Apply patch from Debian to correct a spelling error.
        - https://rt.cpan.org/Ticket/Display.html?id=110987
        - Thanks to Salvatore Bonaccorso for the report and patch.

3.0610      2016-01-06
    - Clarified the docs for add_data_with_samples().
        - Some people thought they were repeat counts of the data , but they
        are normally ignored.
    - Replace remaining tabs with spaces.

3.0609      2015-06-19
    - Update some old URLs and addresses.

3.0608      2015-01-14
    - Apply patch to speed up skewness calculations.
        - https://rt.cpan.org/Public/Bug/Display.html?id=101422
        - Thanks to Shawn (SLAFFAN).