Change the directory of Bootstrap from '_assets' to static 'assets'.

assets/vendor/bootstrap/package.json

@@ -0,0 +1,70 @@
+{
+  "name": "bootstrap",
+  "description": "Sleek, intuitive, and powerful front-end framework for faster and easier web development.",
+  "version": "3.1.1",
+  "keywords": [
+    "bootstrap",
+    "css"
+  ],
+  "homepage": "http://getbootstrap.com",
+  "author": "Twitter, Inc.",
+  "scripts": {
+    "test": "grunt test"
+  },
+  "style": "./dist/css/bootstrap.css",
+  "less": "./less/bootstrap.less",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/twbs/bootstrap.git"
+  },
+  "bugs": {
+    "url": "https://github.com/twbs/bootstrap/issues"
+  },
+  "license": {
+    "type": "MIT",
+    "url": "https://github.com/twbs/bootstrap/blob/master/LICENSE"
+  },
+  "devDependencies": {
+    "btoa": "~1.1.1",
+    "canonical-json": "~0.0.3",
+    "grunt": "~0.4.2",
+    "grunt-banner": "~0.2.0",
+    "grunt-contrib-clean": "~0.5.0",
+    "grunt-contrib-concat": "~0.3.0",
+    "grunt-contrib-connect": "~0.6.0",
+    "grunt-contrib-copy": "~0.5.0",
+    "grunt-contrib-csslint": "~0.2.0",
+    "grunt-contrib-cssmin": "~0.7.0",
+    "grunt-contrib-jade": "~0.9.1",
+    "grunt-contrib-jshint": "~0.8.0",
+    "grunt-contrib-less": "~0.9.0",
+    "grunt-contrib-qunit": "~0.4.0",
+    "grunt-contrib-uglify": "~0.3.0",
+    "grunt-contrib-watch": "~0.5.3",
+    "grunt-csscomb": "~2.0.1",
+    "grunt-exec": "0.4.3",
+    "grunt-html-validation": "~0.1.13",
+    "grunt-jekyll": "~0.4.1",
+    "grunt-jscs-checker": "~0.3.0",
+    "grunt-saucelabs": "~5.0.0",
+    "grunt-sed": "~0.1.1",
+    "load-grunt-tasks": "~0.3.0",
+    "markdown": "~0.5.0"
+  },
+  "jspm": {
+    "main": "js/bootstrap",
+    "directories": {
+      "example": "examples",
+      "lib": "dist"
+    },
+    "shim": {
+      "js/bootstrap": {
+        "imports": "jquery",
+        "exports": "$"
+      }
+    },
+    "buildConfig": {
+      "uglify": true
+    }
+  }
+}