Install wafadmin into $PREFIX/lib/node/wafadmin

This is in preparation for a special node_waf script for building external
modules.

Also change system library path to $PREFIX/lib/node/libraries

src/node.js

@@ -53,7 +53,7 @@ clearInterval = clearTimeout;
 // Module
 
 node.libraryPaths = [ node.path.join(ENV["HOME"], ".node_libraries")
-                    , node.path.join(node.installPrefix, "lib/node_libraries")
+                    , node.path.join(node.installPrefix, "lib/node/libraries")
                     , "/" 
                     ];
 

wscript

@@ -372,4 +372,9 @@ def build(bld):
   """);
   bld.install_files('${PREFIX}/share/man/man1/', 'doc/node.1');
   bld.install_files('${PREFIX}/bin/', 'bin/*', chmod=0755);
-  bld.install_files('${PREFIX}/lib/node_libraries/', 'lib/*.js');
+
+  # Why am I using two lines? Because WAF SUCKS.
+  bld.install_files('${PREFIX}/lib/node/wafadmin', 'tools/wafadmin/*.py');
+  bld.install_files('${PREFIX}/lib/node/wafadmin/Tools', 'tools/wafadmin/Tools/*.py');
+
+  bld.install_files('${PREFIX}/lib/node/libraries/', 'lib/*.js');