make it export to both variable and module

@@ -8,7 +8,7 @@
   "scripts": {
     "test": "grunt qunit",
     "prepublish": "npm run peg",
-    "peg": "pegjs src/m3u8/m3u8.pegjs src/m3u8/m3u8-generated.js",
+    "peg": "pegjs -e 'var M3U8Parser = module.exports' src/m3u8/m3u8.pegjs src/m3u8/m3u8-generated.js",
     "testpeg": "npm run peg && node test/pegtest.js"
   },
   "devDependencies": {
@@ -19,7 +19,7 @@
     "grunt-contrib-watch": "~0.4.0",
     "grunt-contrib-clean": "~0.4.0",
     "grunt": "~0.4.1",
-    "pegjs": "~0.7.0"
+    "pegjs": "git+https://github.com/dmajda/pegjs.git"
   },
   "dependencies": {
     "video.js": "~4.2.2",