Refactor to replace coveralls with codecov

Author: wooorm

.travis.yml

@@ -5,5 +5,5 @@ node_js:
 - '0.11'
 - '0.12'
 - iojs
-after_script: npm install coveralls@2.10.0 && cat ./coverage/lcov.info | coveralls
 sudo: false
+after_script: npm install codecov.io && cat ./coverage/lcov.info | codecov

package.json

@@ -41,9 +41,8 @@
   },
   "scripts": {
     "test-api": "mocha --check-leaks test/index.js",
-    "test-coveralls": "istanbul cover _mocha --report lcovonly -- --check-leaks test/index.js",
     "test-coverage": "istanbul cover _mocha -- test/index.js",
-    "test-travis": "npm run test-coveralls",
+    "test-travis": "npm run test-coverage",
     "test": "npm run test-api",
     "lint-api": "eslint .",
     "lint-style": "jscs --reporter inline .",

readme.md

@@ -1,4 +1,4 @@
-# mdast-zone [![Build Status](https://img.shields.io/travis/wooorm/mdast-zone.svg?style=flat)](https://travis-ci.org/wooorm/mdast-zone) [![Coverage Status](https://img.shields.io/coveralls/wooorm/mdast-zone.svg?style=flat)](https://coveralls.io/r/wooorm/mdast-zone?branch=master)
+# mdast-zone [![Build Status](https://img.shields.io/travis/wooorm/mdast-zone.svg)](https://travis-ci.org/wooorm/mdast-zone) [![Coverage Status](https://img.shields.io/codecov/c/github/wooorm/mdast-zone.svg)](https://codecov.io/github/wooorm/mdast-zone)
 
 HTML comments as ranges or markers in [**mdast**](https://github.com/wooorm/mdast).