Log Message:
Update to 1.15

Release 1.15 - 1 June 2014
 - Allow -coverage default,-pod option to cover (David Cantrell) (github 89).
 - Get cpancover coverage in docker containers.
 - Add CGI.pm as a prerequisite.
 - Test against 5.20.0 and 5.21.0.
 - Add longer delay in tests to try to appease *BSD.

Release 1.14 - 2 May 2014
 - Fix test failures on OpenBSD, NetBSD and Windows.

Release 1.13 - 28 April 2014
 - Test against 5.19.11.
 - Fix "use 5.xyz;" on pre 5.10 perls (github 87).
 - Round percentages down in summary and reports (also fixes Windows tests).