[MATH-1059] Use FastMath instead of Math.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1547633 13f79535-47bb-0310-9956-ffa450edef68
[MATH-1070] Fix Precision.round(float, int, int) for RoundingMode ROUND_UP. Thanks to  Oleksandr Muliarevych.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/math/trunk@1547649 13f79535-47bb-0310-9956-ffa450edef68
Fetch/merge upstream