Update npm modules. See what's new:

Babel 4.4.3 -> 4.6.1: https://github.com/babel/babel/blob/master/CHANGELOG.md
Express.js 4.11.2 -> 4.12.0: https://github.com/strongloop/express/releases
Webpack 1.5.3 -> 1.6.0: https://github.com/webpack/docs/wiki/changelog

package.json

@@ -10,59 +10,59 @@
     "npm": ">= 2.1"
   },
   "dependencies": {
-    "babel": "^4.4.3",
+    "babel": "4.6.1",
     "bootstrap": "3.3.2",
     "eventemitter3": "0.1.6",
-    "express": "4.11.2",
+    "express": "4.12.0",
     "flux": "2.0.1",
-    "front-matter": "0.2.1",
+    "front-matter": "0.2.2",
     "jade": "1.9.2",
-    "lodash": "3.3.0",
+    "lodash": "3.3.1",
     "react": "0.12.2",
     "superagent": "0.21.0"
   },
   "devDependencies": {
     "autoprefixer-loader": "^1.1.0",
-    "babel-core": "^4.4.3",
+    "babel-core": "^4.6.1",
     "babel-loader": "^4.0.0",
     "browser-sync": "^2.2.1",
     "css-loader": "^0.9.1",
     "del": "^1.1.1",
     "gulp": "^3.8.11",
     "gulp-autoprefixer": "^2.1.0",
-    "gulp-cache": "^0.2.7",
+    "gulp-cache": "^0.2.8",
     "gulp-changed": "^1.1.1",
     "gulp-csscomb": "^3.0.3",
     "gulp-gh-pages": "^0.4.0",
     "gulp-htmlmin": "^1.1.1",
     "gulp-if": "^1.2.5",
-    "gulp-imagemin": "^2.2.0",
+    "gulp-imagemin": "^2.2.1",
     "gulp-jsbeautifier": "^0.0.4",
     "gulp-jshint": "^1.9.2",
     "gulp-less": "^3.0.1",
-    "gulp-load-plugins": "^0.8.0",
-    "gulp-minify-css": "^0.4.6",
+    "gulp-load-plugins": "^0.8.1",
+    "gulp-minify-css": "^0.5.0",
     "gulp-plumber": "^0.6.6",
     "gulp-rename": "^1.2.0",
     "gulp-render": "^0.2.2",
     "gulp-replace": "^0.5.3",
-    "gulp-size": "^1.2.0",
+    "gulp-size": "^1.2.1",
     "gulp-uglify": "^1.1.0",
-    "gulp-util": "^3.0.3",
+    "gulp-util": "^3.0.4",
     "jest-cli": "^0.4.0",
-    "jshint": "^2.6.0",
-    "jshint-loader": "^0.8.2",
-    "jshint-stylish": "^1.0.0",
+    "jshint": "^2.6.2",
+    "jshint-loader": "^0.8.3",
+    "jshint-stylish": "^1.0.1",
     "less": "^2.4.0",
     "less-loader": "^2.0.0",
     "minimist": "^1.1.0",
     "protractor": "^1.7.0",
-    "psi": "^1.0.5",
+    "psi": "^1.0.6",
     "react-tools": "^0.12.2",
     "run-sequence": "^1.0.2",
     "style-loader": "^0.8.3",
     "url-loader": "^0.5.5",
-    "webpack": "^1.5.3",
+    "webpack": "^1.6.0",
     "webpack-dev-server": "^1.7.0"
   },
   "jest": {