Support more node targets and coveralls in travis

.travis.yml

@@ -1,5 +1,7 @@
 language: node_js
 node_js:
+  - "0.11"
+  - "0.12"
   - "4"
   - "5"
 env:
@@ -10,3 +12,16 @@ addons:
     - ubuntu-toolchain-r-test
     packages:
     - g++-4.8
+env:
+  matrix:
+    - CXX=g++-4.8 TEST_SUITE=test
+matrix:
+  fast_finish: true
+  include:
+    - os: linux
+      node_js: "4"
+      env: CXX=g++-4.8 TEST_SUITE=coveralls
+    - os: linux
+      node_js: "4"
+      env: CXX=g++-4.8 TEST_SUITE=lint
+script: npm run $TEST_SUITE

README.md

@@ -1,6 +1,7 @@
 # SYNOPSIS
 [![NPM Package](https://img.shields.io/npm/v/ethashjs.svg?style=flat-square)](https://www.npmjs.org/package/ethashjs)
 [![Build Status](https://travis-ci.org/ethereumjs/ethashjs.svg?branch=master&style=flat-square)](https://travis-ci.org/ethereumjs/ethashjs)
+[![Coverage Status](https://img.shields.io/coveralls/ethereumjs/ethashjs.svg?style=flat-square)](https://coveralls.io/r/ethereumjs/ethashjs)
 [![Gitter](https://img.shields.io/gitter/room/ethereum/ethereumjs-lib.svg?style=flat-square)](https://gitter.im/ethereum/ethereumjs-lib) or #ethereumjs on freenode
 
 Implements [Ethash](https://github.com/ethereum/wiki/wiki/Ethash)

package.json

@@ -8,6 +8,7 @@
   },
   "scripts": {
     "coverage": "istanbul cover ./tests/",
+    "coveralls": "npm run coverage && coveralls <coverage/lcov.info",
     "lint": "standard",
     "test": "node ./tests/"
   },
@@ -33,6 +34,7 @@
     "miller-rabin": "^4.0.0"
   },
   "devDependencies": {
+    "coveralls": "^2.11.4",
     "ethereumjs-block": "^1.2.2",
     "ethereumjs-testing": "0.0.1",
     "istanbul": "^0.4.1",