Stop using TravisCI anymore due to IPv6 issue

.travis.yml

@@ -1,14 +0,0 @@
-# Environment
-language: cpp
-os:
-  - linux
-  - osx
-
-# Compiler selection
-compiler:
-  - clang
-
-# Build/test steps
-script:
-  - cd ${TRAVIS_BUILD_DIR}/test
-  - make all