Windows support

package.json

@@ -32,7 +32,7 @@
     "release:patch": "npm version patch && npm publish",
     "release:minor": "npm version minor && npm publish",
     "release:major": "npm version major && npm publish",
-    "compile": "rm -rf lib/ && babel -d lib/ src/ && mkdir lib/public/ && cp src/public/* lib/public/",
+    "compile": "rimraf lib/ && babel -d lib/ src/ && mkdir lib/public/ && cp src/public/* lib/public/",
     "watch": "babel --watch -d lib/ src/",
     "jshint": "jshint src/. test/. --config",
     "mocha": "mocha --recursive test/ --compilers js:babel-core/register",
@@ -76,6 +76,7 @@
     "primus": "^5.0.1",
     "primus-emitter": "^3.1.1",
     "request": "^2.69.0",
+    "rimraf": "^2.5.4",
     "sinon": "^1.17.3",
     "sinon-chai": "^2.8.0",
     "socket.io-client": "^1.1.0",