Add coveralls coverage report

.travis.yml

@@ -1,6 +1,6 @@
 language: node_js
 node_js:
-- stable
+  - stable
 before_script:
-- npm install -g gulp
-script: gulp
+  - npm install -g gulp
+script: npm run-script travis

README.md

@@ -1,5 +1,7 @@
 # Chained Promise: functional programming tools for recurring promises
 
+[![Build Status](https://travis-ci.org/google/chained-promise.svg?branch=travis-ci)](https://travis-ci.org/google/chained-promise) [![Coverage Status](https://coveralls.io/repos/google/chained-promise/badge.svg?branch=master&service=github)](https://coveralls.io/github/google/chained-promise?branch=master)
+
 We often find recurring patterns when handling asynchronous logic with promises, such as an HTTP endpoint that paginates and gives you a URL pointer to the next available dataset.
 
 `Chained Promise` provides an extended Promise class that you can use to easily abstract out recurring patterns. See jsdocs for more detailed explanations.

package.json

@@ -16,7 +16,9 @@
   ],
   "scripts": {
     "test": "gulp test",
-    "travis": "gulp"
+    "coveralls": "gulp coverage && cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js",
+    "travis": "gulp",
+    "posttravis": "npm run-script coveralls"
   },
   "authors": [
     "In-Ho Yi <yiinho@google.com>"
@@ -29,6 +31,7 @@
     "babel-preset-es2015": "^6.3.13",
     "babel-register": "^6.3.13",
     "chai": "^3.4.1",
+    "coveralls": "^2.11.6",
     "gulp": "^3.9.0",
     "gulp-babel": "^6.1.1",
     "gulp-exit": "0.0.2",
@@ -38,6 +41,5 @@
     "isparta": "^4.0.0",
     "mocha-babel": "^3.0.0"
   },
-  "dependencies": {
-  }
+  "dependencies": {}
 }