Added slugified urls to documents

package.json

@@ -77,6 +77,7 @@
     "pg": "^4.5.3",
     "pg-hstore": "^2.3.2",
     "querystring": "^0.2.0",
+    "randomstring": "^1.1.5",
     "react": "^0.14.7",
     "react-codemirror": "^0.2.5",
     "react-dom": "^0.14.7",
@@ -98,6 +99,7 @@
     "sequelize": "^3.21.0",
     "sequelize-cli": "^2.3.1",
     "sequelize-encrypted": "^0.1.0",
+    "slug": "^0.9.1",
     "style-loader": "^0.13.0",
     "to-markdown": "^2.0.1",
     "truncate-html": "0.0.6",