Add travis.yml file for linux builds

.travis.yml

@@ -0,0 +1,14 @@
+dist: trusty
+language: cpp
+compiler:
+  - gcc-4.8
+before_script:
+  - sudo apt-get install  -y gcc-4.8 g++-4.8 libopencv-dev libboost1.55-all-dev cmake
+  - wget http://affdex-sdk-dist.s3-website-us-east-1.amazonaws.com/linux/download_sdk.html -O /tmp/affdex-sdk.tar.gz
+  - mkdir /tmp/affdex-sdk
+  - tar -xzvf /tmp/affdex-sdk.tar.gz -C /tmp/affdex-sdk
+  - mkdir build
+  - cd build
+  - cmake -DBOOST_ROOT=/usr/ -DOpenCV_DIR=/usr/ -DAFFDEX_DIR=/tmp/affdex-sdk ..
+script:
+  - make