remove travis CI integration

It's doing more harm than good.

.travis.yml

@@ -1,12 +0,0 @@
-dist: trusty
-before_install:
- - sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y
- - travis_retry sudo apt-get update -q
- - travis_retry sudo apt-get install g++-4.9 cmake libasound2-dev -y
- - export CXX="g++-4.9" CC="gcc-4.9"
-script:
- - mkdir build
- - cd build
- - cmake ..
- - make
- - sudo make install