Base class for all WMS KvpRequestReaders, wich just adds the
getRequestVersion() method wich returns the spec version a client has
requested or the default implementation version of this server if no
version has been requested, either by the "VERSION" parameter or by the
"WMTVER" parameter, wich is deprecated but it is recomended to recognize it
author: Gabriel Rold?n version: $Id: WmsKvpRequestReader.java 6326 2007-03-15 18:36:40Z jdeolive $