adding coverage reporting

.gitignore

@@ -13,3 +13,4 @@ results
 
 npm-debug.log
 /node_modules
+/coverage

.travis.yml

@@ -3,3 +3,5 @@ node_js:
   - "0.10"
   - "0.8"
   - "0.6"
+after_script:
+  - npm run coveralls

README.md

@@ -1,4 +1,5 @@
 [![Build Status](https://secure.travis-ci.org/selfcontained/deap.svg?branch=master)](http://travis-ci.org/selfcontained/deap)
+[![Coverage Status](https://img.shields.io/coveralls/selfcontained/deap.svg)](https://coveralls.io/r/selfcontained/deap?branch=master)
 ===
 
 [![browser support](https://ci.testling.com/selfcontained/deap.png)](http://ci.testling.com/selfcontained/deap)

package.json

@@ -4,7 +4,9 @@
   "description": "extend and merge objects, deep or shallow",
   "main": "index.js",
   "scripts": {
-    "test": "./node_modules/.bin/mocha test/*.test.js"
+    "test": "./node_modules/.bin/mocha test/*.test.js",
+    "coverage": "istanbul cover --report html node_modules/.bin/_mocha",
+    "coveralls": "istanbul cover ./node_modules/mocha/bin/_mocha --report lcovonly -- && cat ./coverage/lcov.info | coveralls"
   },
   "repository": {
     "type": "git",
@@ -34,7 +36,9 @@
   "readmeFilename": "README.md",
   "devDependencies": {
     "mocha": "~1.9.0",
-    "chai": "~1.6.0"
+    "chai": "~1.6.0",
+    "istanbul": "^0.2.8",
+    "coveralls": "^2.10.0"
   },
   "testling": {
     "browsers": [