[minor] add code coverage

.gitignore

@@ -6,3 +6,4 @@ npm-debug.log
 example/dist/*
 test/dist/*
 .DS_Store
+.coveralls.yml

README.md

@@ -4,9 +4,12 @@ isn't scared for a couple bugs you're more than welcome to go on this adventure.
 If not, please wait until 1.0 has been released.
 ```
 
-[![Build Status](https://travis-ci.org/bigpipe/bigpipe.png?branch=master)](https://travis-ci.org/bigpipe/bigpipe)
+# BigPipe [![Build Status][status]](https://travis-ci.org/bigpipe/bigpipe) [![NPM version][npmimgurl]](http://badge.fury.io/js/bigpipe) [![Coverage Status][coverage]](http://coveralls.io/r/bigpipe/bigpipe?branch=master)
+
+[status]: https://travis-ci.org/bigpipe/bigpipe.png
+[npmimgurl]: https://badge.fury.io/js/bigpipe.png
+[coverage]: http://coveralls.io/repos/bigpipe/bigpipe/badge.png?branch=master
 
-# BigPipe
 
 BigPipe is a radical new web framework that is inspired by the concept behind
 Facebook's BigPipe. The general idea is to decompose web pages in to small

package.json

@@ -5,7 +5,8 @@
   "main": "index.js",
   "engine": "node >= 0.10.0",
   "scripts": {
-    "test": "mocha $(find test -name '*.test.js')"
+    "test": "NODE_ENV=test ./node_modules/.bin/mocha $(find test -name '*.test.js')",
+    "coverage": "NODE_ENV=test ./node_modules/.bin/istanbul cover ./node_modules/.bin/_mocha --report lcovonly -- -R spec && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js || true && rm -rf ./coverage"
   },
   "pre-commit": [
     "compile",
@@ -32,7 +33,10 @@
   },
   "devDependencies": {
     "chai": "~1.8.1",
+    "coveralls": "~2.8.0",
+    "istanbul": "~0.2.6",
     "mocha": "~1.17.1",
+    "mocha-lcov-reporter": "~0.0.1",
     "pre-commit": "~0.0.4",
     "sinon": "~1.7.3",
     "sinon-chai": "~2.4.0"