Enabling GENERATE_PYTHON_BINDINGS on travis

.travis.yml

@@ -15,11 +15,12 @@ before_install:
   - sudo apt-get install gcc-5 g++-5 -y
   - sudo apt-get install clang-3.8 -y
   - sudo apt-get install libboost-all-dev libeigen3-dev libopencv-dev -y
+  - sudo apt-get install python3 python3-dev
 
 before_script:
   - mkdir build
   - cd build
-  - cmake -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${CXX_COMPILER} -DBUILD_EXAMPLES=on -DBUILD_UTILS=on ..
+  - cmake -DCMAKE_C_COMPILER=${C_COMPILER} -DCMAKE_CXX_COMPILER=${CXX_COMPILER} -DBUILD_EXAMPLES=on -DBUILD_UTILS=on -DGENERATE_PYTHON_BINDINGS=on ..
 
 script:
   - make VERBOSE=1