Moving more things to before install

.travis.yml

@@ -43,13 +43,19 @@ before_install:
         export CXX="clang++-3.4";
       fi
     fi
-  
-before_script:
+	
+  - if [ ${TRAVIS_OS_NAME} = osx ]; then
+      brew update;
+      brew tap homebrew/science;
+    fi
+
   - wget https://github.com/Itseez/opencv/archive/3.1.0.zip 
   - sudo unzip 3.1.0.zip
   - cd opencv-3.1.0
   - sudo mkdir build
   - cd build
+  
+before_script:
   - if [ "$CXX" = "g++" ]; then sudo cmake -D CMAKE_BUILD_TYPE=RELEASE -D WITH_V4L=ON -D WITH_OPENCL=OFF -D INSTALL_C_EXAMPLES=OFF -D BUILD_EXAMPLES=OFF -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D BUILD_EXAMPLES=OFF -D INSTALL_PYTHON_EXAMPLES=OFF .. ; fi
   - if [ "$CXX" = "clang++" ]; then sudo cmake -D CMAKE_CXX_COMPILER=clang++ -D CMAKE_CXX_FLAGS="-std=c++11 -stdlib=libc++ -I/usr/include/libcxxabi" -D CMAKE_EXE_LINKER_FLAGS="-std=c++11 -stdlib=libc++ -lc++abi" -D CMAKE_BUILD_TYPE=RELEASE -D WITH_V4L=ON -D WITH_OPENCL=OFF -D INSTALL_C_EXAMPLES=OFF -D BUILD_EXAMPLES=OFF -D BUILD_TESTS=OFF -D BUILD_PERF_TESTS=OFF -D BUILD_EXAMPLES=OFF -D INSTALL_PYTHON_EXAMPLES=OFF .. ; fi  
   - sudo make -j4