Setup Travis CI integration

Yes please

.travis.yml

@@ -7,7 +7,7 @@ compiler:
   - gcc
 
 before_install:
-  - if [ $TRAVIS_OS_NAME == linux ]; then sudo add-apt-repository ppa:keithw/glfw3 && sudo apt-get update -qq && sudo apt-get install -y --no-install-recommends libglfw3-dev libglew-dev; fi
+  - if [ $TRAVIS_OS_NAME == linux ]; then sudo add-apt-repository -y ppa:keithw/glfw3 && sudo apt-get update -qq && sudo apt-get install -y --no-install-recommends libglfw3-dev libglew-dev; fi
   - if [ $TRAVIS_OS_NAME == osx ]; then brew update && brew install glew && brew install glfw3; fi
 
 script: