Moved org.apache.sis.math.matrix to org.apache.sis.referencing.operation.matrix for the following reasons:

1) Make clear that this is not a general-purpose matrix package, but something designed for the particular needs of referencing by coordinates.
2) Make clear that those classes are defined in the sis-referencing module rather than sis-utility.

Updated package-info.java javadoc for explaining some of the above.



git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1521437 13f79535-47bb-0310-9956-ffa450edef68