Simplification attempt: remove the Formattable interface.
This interface was initially introduced for making easier to format subclasses of java.awt.geom.AffineTransform.
However SIS will try to reduce direct dependencies to Java2D, which remove the main motivation for Formattable interface.


git-svn-id: https://svn.apache.org/repos/asf/sis/branches/JDK7@1542818 13f79535-47bb-0310-9956-ffa450edef68