Update travis env

Author: jwagner

.travis.yml

@@ -1,8 +1,15 @@
 language: node_js
+sudo: false
 node_js:
     - "node"
     - "6"
     - "5"
-    - "4"
+   - "4"
+addons:
+  apt:
+    sources:
+    - ubuntu-toolchain-r-test
+    packages:
+    - g++-4.8
 before_install:
-    - sudo apt-get install imagemagick
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then export CXX=g++-4.8; fi

README.md

@@ -1,5 +1,5 @@
 # simplex-noise.js
-[![Build Status](https://travis-ci.org/jwagner/simplex-noise.svg?branch=master)](https://travis-ci.org/jwagner/simplex-noise)
+[![Build Status](https://travis-ci.org/jwagner/simplex-noise.js.svg?branch=master)](https://travis-ci.org/jwagner/simplex-noise.js)
 
 simplex-noise.js is a fast simplex noise implementation in Javascript. It works in the browser and on nodejs.