Added a travis file

.travis.yml

@@ -0,0 +1,38 @@
+sudo: required
+dist: trusty
+language: c
+compiler:
+    - gcc
+    - clang
+
+before_install:
+    - sudo add-apt-repository -y ppa:zoogie/sdl2-snapshots
+    - sudo add-apt-repository -y ppa:george-edison55/cmake-3.x
+    - sudo add-apt-repository -y ppa:h-rayflood/llvm
+
+      #g++4.9
+    - if [ "$CXX" = "g++" ]; then sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test; fi
+
+      #clang 4.0 
+    - if [ "$CXX" == "clang++" ]; then wget -O - http://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -; fi
+    - if [ "$CXX" == "clang++" ]; then sudo add-apt-repository -y "deb http://apt.llvm.org/trusty/ llvm-toolchain-trusty-4.0 main"; fi
+
+    - sudo apt-get update -qq
+
+install:
+    - sudo apt-get install -y libsdl2-dev libsdl2-image-dev libsdl2-mixer-dev libsdl2-ttf-dev
+    - sudo apt-get install -y cmake cmake-data check
+
+      #g++6
+    - if [ "$CXX" = "g++" ]; then sudo apt-get install -y g++-6; fi
+    - if [ "$CXX" = "g++" ]; then export CXX="g++-6" CC="gcc-6"; fi
+
+      #clang 4.0
+    - if [ "$CXX" == "clang++" ]; then sudo apt-get install -y clang-4.0; fi
+    - if [ "$CXX" == "clang++" ]; then export CXX="clang++-4.0"; fi
+
+script:
+    - mkdir build
+    - cd build
+    - make
+    - make test