FIX: TravisCI SimpleRTK PythonLibs issues using solution suggested in

pybind/pybind11#99 comments

Author: Simon Rit

.travis.yml

@@ -112,6 +112,7 @@ script:
   - CMAKE_OPTIONS="-DBUILD_APPLICATIONS=${APPLICATIONS} ${CMAKE_OPTIONS}"
   - CMAKE_OPTIONS="-DBUILD_TESTING=${TESTING} ${CMAKE_OPTIONS}"
   - if test $SIMPLERTK == ON ; then CMAKE_OPTIONS="-DBUILD_SIMPLERTK=ON -DWRAP_PYTHON=ON ${CMAKE_OPTIONS}"; fi
+  - if test $SIMPLERTK == ON ; then CMAKE_OPTIONS="-DPYTHON_LIBRARY=$(python-config --prefix)/lib/libpython2.7.dylib -DPYTHON_INCLUDE_DIR=$(python-config --prefix)/include/python2.7 ${CMAKE_OPTIONS}"; fi
   - if test $TRAVIS_OS_NAME == linux ; then CMAKE_OPTIONS="-DRTK_USE_KWSTYLE=ON ${CMAKE_OPTIONS}"; fi
   - if [ $DO_BUILD_RTK == true ]; then cmake .. $CMAKE_OPTIONS || travis_terminate 1; fi
   - if [ $DO_BUILD_RTK == true ] && [ "$TRAVIS_OS_NAME" == linux ]; then make StyleCheckCode || travis_terminate 1; fi