Add compression support.

For each file matching a list of supplied extensions, gzip will be used
to write a compressed copy, and placed along side the original.

@@ -717,6 +717,18 @@ module.exports = function (grunt) {
                 }
             };
         }
+        if (mpConfig.gzip) {
+            initConfig.compress = {
+                dist: {
+                    options: {
+                        mode: 'gzip',
+                    },
+                    files: _.map(mpConfig.gzip.options.extensions, function(value) {
+                        return {expand: true, cwd: 'dist/build', src: ['**/*.' + value], dest: 'dist/build', extDot: 'last', ext: '.' + value + '.gz'};
+                    }),
+                },
+            };
+        }
 
         grunt.initConfig(initConfig);
         grunt.config('montyPython.config', mpConfig);
@@ -846,6 +858,9 @@ module.exports = function (grunt) {
             }
             buildList.push('do-use');
             buildList.push('htmlmin');                  // montyPython
+            if (mpConfig.gzip) {
+                buildList.push('compress:dist');
+            }
             buildList.push('deploy');                   // montyPython
 
             grunt.task.run(buildList);

@@ -18,6 +18,7 @@
     "grunt": "",
     "grunt-contrib-clean": "",
     "grunt-contrib-concat": "",
+    "grunt-contrib-compress": "",
     "grunt-contrib-copy": "",
     "grunt-contrib-csslint": "",
     "grunt-contrib-cssmin": "",