all these changes

frontend/node_modules/density-clustering/gulpfile.js

@@ -0,0 +1,30 @@
+(function () {
+  'use strict';
+
+  // dependencies
+  var gulp = require('gulp');
+  var concat = require('gulp-concat');
+  var uglify = require('gulp-uglify');
+  var resolveDependencies = require('gulp-resolve-dependencies');
+
+  // source
+  var sources = './lib/*.js';
+
+  gulp.task('build', function () {
+    return gulp.src(sources)
+      .pipe(resolveDependencies())
+      .pipe(concat('clustering.js'))
+      .pipe(gulp.dest('./dist'))
+    ;
+  });
+
+  gulp.task('build-min', ['build'], function () {
+    return gulp.src('./dist/clustering.js')
+      .pipe(uglify())
+      .pipe(concat('clustering.min.js'))
+      .pipe(gulp.dest('./dist'))
+    ;
+  });
+
+  gulp.task('default', ['build-min']);
+})();