TravisCI: fix script, add OSX builds

.travis.yml

@@ -1,12 +1,27 @@
-sudo: required
-dist: trusty
 language: c
+
+os:
+  - linux
+  - osx
+
 compiler:
   - gcc
   - clang
-before_install:
-  - sudo apt-get install libconfuse-dev
-  - sudo apt-get install libnl-3-dev libnl-route-3-dev
-  - sudo apt-get install libncurses-dev
-# Change this to your needs
-script: ./.travis/run.sh
+
+# container-based builds
+sudo: false
+addons:
+  apt:
+    packages:
+    # packages list: https://github.com/travis-ci/apt-package-whitelist/blob/master/ubuntu-precise
+    - libconfuse-dev
+    - libncurses5-dev
+    - libnl-3-dev
+    - libnl-route-3-dev
+
+
+install:
+  - if [ "$TRAVIS_OS_NAME" = "osx" ]; then brew update > /dev/null && brew install confuse ; fi
+
+script:
+  - ./.travis/run.sh