Another attempt at travis.

.travis.yml

@@ -16,6 +16,7 @@ before_install:
 
   # OpenCV dependencies and boost
   - if [ ${TRAVIS_OS_NAME} = linux ]; then  
+      apt-get install libopenblas-dev;
       apt-get install git libgtk2.0-dev pkg-config libavcodec-dev libavformat-dev libswscale-dev;      
       apt-get install python-dev python-numpy libtbb2 libtbb-dev libjpeg-dev libpng-dev libtiff-dev libjasper-dev libdc1394-22-dev checkinstall;
       apt-get install cmake;
@@ -47,6 +48,7 @@ before_install:
   - if [ ${TRAVIS_OS_NAME} = osx ]; then  
       brew update;
       brew install tbb;
+      brew tap homebrew/science
       brew install opencv3 --HEAD;
     fi