Switch to codecov for coverage and add codacy grade to README

.travis.yml

@@ -5,5 +5,4 @@ node_js:
  - "4"
 after_script:
  - npm run coverage
- - cat ./coverage/lcov.info | ./node_modules/.bin/codacy-coverage
  - bash <(curl -s https://codecov.io/bash)

README.md

@@ -3,10 +3,10 @@ Parse Java stack traces and transform them into comprehensive JS objects
 
 You can checkout [this working demo](http:https://codepen.io/tbouron/pen/wzOkwr/) to see how it looks like.
 
-| Branch | Build | Test coverage |
-| --- | --- | --- |
-| `master` | [![Travis](https://img.shields.io/travis/tbouron/java-stack-parser/master.svg)](https://travis-ci.org/tbouron/java-stack-parser/branches) | [![Codacy](https://img.shields.io/codacy/coverage/ec26bba6230f483e958972fb376f075e/master.svg)](https://www.codacy.com/app/tbouron/java-stack-parser/files?bid=3852863) |
-| `develop` | [![Travis](https://img.shields.io/travis/tbouron/java-stack-parser/develop.svg)](https://travis-ci.org/tbouron/java-stack-parser/branches) | [![Codacy](https://img.shields.io/codacy/coverage/ec26bba6230f483e958972fb376f075e/develop.svg)](https://www.codacy.com/app/tbouron/java-stack-parser/files?bid=3852862) |
+| Branch | Build | Grade | Test coverage |
+| --- | --- | --- | --- |
+| `master` *(Stable)* | [![Travis](https://img.shields.io/travis/tbouron/java-stack-parser/master.svg)](https://travis-ci.org/tbouron/java-stack-parser/branches) | [![Codacy](https://img.shields.io/codacy/grade/ec26bba6230f483e958972fb376f075e/master.svg)](https://www.codacy.com/app/tbouron/java-stack-parser/dashboard?bid=3852863) | [![Codecov](https://img.shields.io/codecov/c/github/tbouron/java-stack-parser/master.svg)](https://codecov.io/gh/tbouron/java-stack-parser/branch/master) |
+| `develop` | [![Travis](https://img.shields.io/travis/tbouron/java-stack-parser/develop.svg)](https://travis-ci.org/tbouron/java-stack-parser/branches) | [![Codacy](https://img.shields.io/codacy/grade/ec26bba6230f483e958972fb376f075e/develop.svg)](https://www.codacy.com/app/tbouron/java-stack-parser/dashboard?bid=3852862) | [![Codecov](https://img.shields.io/codecov/c/github/tbouron/java-stack-parser/develop.svg)](https://codecov.io/gh/tbouron/java-stack-parser/branch/develop) |
 
 ## Install
 

package.json

@@ -32,7 +32,6 @@
  "babel-plugin-add-module-exports": "0.1.2",
  "babel-preset-es2015": "^6.18.0",
  "chai": "^3.5.0",
- "codacy-coverage": "^2.0.0",
  "eslint": "^3.8.1",
  "eslint-loader": "^1.6.0",
  "istanbul": "^1.0.0-alpha.2",