Initial port of 2 basic map projection parameter classes.
While not really in the scope of SIS 0.4 RC, we need those classes in order
to move GeneralParameterValue WKT formatting code out of the Formatter class.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1565490 13f79535-47bb-0310-9956-ffa450edef68