add missing cache tests, detect server.js directly

bin/detect

@@ -3,6 +3,8 @@
 
 if [ -f $1/package.json ]; then
   echo "Node.js" && exit 0
+elif [ -f $1/server.js ]; then
+  echo "Node.js" && exit 0
 else
   echo "no" && exit 1
 fi

test/node-modules-cache-1/README.md

+A fake README, to keep npm from polluting stderr.
\ No newline at end of file

test/node-modules-cache-1/package.json

+{
+  "name": "node-buildpack-test-app",
+  "version": "0.0.1",
+  "description": "node buildpack integration test app",
+  "repository": {
+    "type": "git",
+    "url": "http://github.com/example/example.git"
+  },
+  "dependencies": {
+    "lodash": "1.0.0"
+  },
+  "engines": {
+    "node": "~0.10.0"
+  }
+}

test/node-modules-cache-2/README.md

+A fake README, to keep npm from polluting stderr.
\ No newline at end of file

test/node-modules-cache-2/package.json

+{
+  "name": "node-buildpack-test-app",
+  "version": "0.0.1",
+  "description": "node buildpack integration test app",
+  "repository": {
+    "type": "git",
+    "url": "http://github.com/example/example.git"
+  },
+  "dependencies": {
+    "lodash": "^1.0.0"
+  },
+  "engines": {
+    "node": "~0.10.0"
+  }
+}