I checked out the lates codebase from Github but had to realize that indeed the live reload feature is activated in the gulpfile.js (livereload: true), but that it isn't working.

For my setup I could fix this, by appending all gulp tasks by the following code:
.pipe(plugins.connect.reload());

Example for app-pages.js-file:
Before:

// Output 
.pipe(gulp.dest(config.destDir)); 

After:

.pipe(gulp.dest(config.destDir)) 
.pipe(plugins.connect.reload()); 

If this is a general problem and not only for me, than I can send in a pull request, if wanted.