Added Travis CI script

.travis.yml

+language: cpp
+compiler:
+ - gcc
+before_install:
+ - sudo add-apt-repository -y "deb http://archive.ubuntu.com/ubuntu/ trusty main universe"
+ - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
+ - sudo apt-get -qq update
+ - sudo apt-get -qq install libgtest-dev g++-4.8 xorg-dev libglu1-mesa-dev
+ - sudo update-alternatives --install /usr/bin/g++ g++ /usr/bin/g++-4.8 90
+ - git clone https://github.com/glfw/glfw.git
+ - "cd glfw && mkdir build && cd build && cmake .. && make && sudo make install ; cd -"
+ - "cd /usr/src/gtest && sudo cmake . && sudo cmake --build . && sudo mv libg* /usr/local/lib/ ; cd -"
+script:
+ - mkdir build && cd build
+ - cmake ..
+ - make -j4
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