Use newer travis infrastructure

.travis.yml

@@ -3,14 +3,7 @@ node_js:
 - '0.10'
 script:
 - npm run build && npm test
-before_install:
-- sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test;
-- sudo apt-get update;
-- sudo apt-get install gcc-4.8 g++-4.8;
-- sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-4.8 20;
-- sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 20;
-- sudo g++ --version;
-- sudo apt-get update -qq;
+sudo: false
 after_success:
   cat ./coverage/lcov.info | ./node_modules/coveralls/bin/coveralls.js
 notifications: