added runtime test for python on macosx and linux

Former-commit-id: 63f1533fdff1646435fe4f5b90bec9cbf189fb35

.travis.yml

@@ -13,6 +13,8 @@ matrix:
         - cd build
         - cmake -DCMAKE_CXX_COMPILER=g++-4.8 -DCMAKE_C_COMPILER=gcc-4.8 -DLIBIGL_WITH_EMBREE=OFF -DLIBIGL_USE_STATIC_LIBRARY=ON ../
         - make -j 2
+        - cd ../tutorial
+        - python 101_FileIO.py
         - cd ../../
         - cd tutorial
         - mkdir build
@@ -54,6 +56,8 @@ matrix:
         - cd build
         - cmake ../
         - make -j 2
+        - cd ../tutorial
+        - python 101_FileIO.py
         - cd ../../
         - cd tutorial
         - mkdir build