Travis getting SDL2 from repo

.travis.yml

     - clang
 
 before_install:
+    - sudo add-apt-repository ppa:zoogie/sdl2-snapshots
     - sudo apt-get -qq -y update
 
 install:
-    - sudo apt-get -qq -y install libalut-dev libpng12-dev zlib1g-dev
-    - wget http://libsdl.org/release/SDL2-2.0.3.tar.gz -O - | tar xz
-    - (cd SDL2-2.0.3 && ./configure && make -j5 && sudo make install)
-    - wget https://libsdl.org/projects/SDL_ttf/release/SDL2_ttf-2.0.12.tar.gz -O - | tar xz
-    - (cd SDL2_ttf-2.0.12 && ./configure && make -j5 && sudo make install)
+    - sudo apt-get -qq -y install libsdl2 libsdl2-ttf libalut-dev libpng12-dev zlib1g-dev
 
 script:
     - (mkdir build && cd build && cmake .. && make)