Download grizzly-npn-osgi JAR file with all dependencies

This empty module allows the bootclasspath classes in org.glassfish.grizzly.npn to be available via the OSGi classloading mechanisms. Using GlassFish as an example: - grizzly-npn-bootstrap.jar goes into the domain's bootclasspath (-Xbootclasspath/p:[PATH TO THE JAR]) - grizzly-npn-osgi and grizzly-spdy JARs go into the $GF_HOME/modules directory.