Added Apache license headers.

The header has been added to data files, and the corresponding test has
been updated to ignore the header lines.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1454721 13f79535-47bb-0310-9956-ffa450edef68
Added Apache license header.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1454722 13f79535-47bb-0310-9956-ffa450edef68
Added Apache license headers.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1454723 13f79535-47bb-0310-9956-ffa450edef68