Store the error terms for double-double arithmetic in AffineTransform2D and ProjectiveTransform.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK8@1606263 13f79535-47bb-0310-9956-ffa450edef68
Merge from the JDK8 branch.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1606264 13f79535-47bb-0310-9956-ffa450edef68