Re-add craftscripts to package.

Mistakenly removed this when messing with NmsBlocks.

src/main/assembly/default.xml

@@ -27,7 +27,8 @@
       <includes>
         <include>LICENSE.txt</include>
         <include>CHANGELOG.txt</include>
+        <include>contrib/craftscripts/*</include>
       </includes>
     </fileSet>
   </fileSets>
-</assembly>
+</assembly>