Use bower to install underscore and backbone.

@@ -3,3 +3,4 @@
 dist/
 .grunt/
 node_modules/
+src/lib/bower/

+{
+  "name": "solr-frontend",
+  "version": "0.0.0",
+  "authors": [
+    "Adam Heath <adam@brainfood.com>"
+  ],
+  "description": "Solr Frontend",
+  "license": "Apache",
+  "ignore": [
+    "**/.*",
+    "node_modules",
+    "src/lib/bower",
+    "test",
+    "tests"
+  ],
+  "dependencies": {
+    "backbone": "~1.1.2",
+    "underscore": "~1",
+    "requirejs": "~2.1.17"
+  }
+}

@@ -6,7 +6,10 @@ require = (function() {
     var require = {
         baseUrl: 'scripts',
         deps: ['main'],
-        paths: {},
+        paths: {
+            'backbone': '../lib/bower/backbone/backbone',
+            'underscore': '../lib/bower/underscore/underscore',
+        },
     };
     return require;
 })();