[added] Peer dependency on history package

Fixes #2211
Fixes #2252

Author: mjackson

README.md

@@ -28,7 +28,11 @@ We support all browsers and environments where React runs.
 
 #### npm + webpack/browserify
 
-    $ npm install react-router@1.0.0-rc3
+Install using [npm](https://www.npmjs.com/):
+
+    $ npm install history react-router@latest
+
+Note that you need to also install the [history](https://www.npmjs.com/package/history) package since it is a peer dependency of React Router and won't automatically be installed for you in npm 3+.
 
 Then with a module bundler or webpack, use as you would anything else:
 

package.json

@@ -24,10 +24,12 @@
   ],
   "license": "MIT",
   "dependencies": {
-    "history": "1.12.3",
     "invariant": "^2.0.0",
     "warning": "^2.0.0"
   },
+  "peerDependencies": {
+    "history": "~1"
+  },
   "devDependencies": {
     "babel": "^5.4.7",
     "babel-core": "^5.4.7",
@@ -41,6 +43,7 @@
     "express": "^4.13.3",
     "express-urlrewrite": "^1.2.0",
     "gzip-size": "^3.0.0",
+    "history": "^1.12.5",
     "karma": "^0.13.8",
     "karma-browserstack-launcher": "^0.1.4",
     "karma-chrome-launcher": "^0.2.0",