Make gulp "processindex" command work under Windows

ProcessIndex command was using single quotes around the index.html file
path, need double quotes to work on Windows.   Tested double quotes
under Ubuntu and still worked there.

www/base/guanlecoja/config.coffee

@@ -59,7 +59,7 @@ config =
 gulp.task 'processindex', ['index'], ->
     indexpath = path.join(config.dir.build, 'index.html')
     gulp.src ""
-        .pipe shell("buildbot processwwwindex -i '#{indexpath}'")
+        .pipe shell("buildbot processwwwindex -i \"#{indexpath}\"")
 
 gulp.task 'proxy', ['processindex'], ->
     # this is a task for developing, it proxy api request to http://nine.buildbot.net