Add Python.h

.travis.yml

@@ -5,13 +5,14 @@ dist: trusty
 language: generic
 
 before_install:
+  - sudo -H apt-get install -qq -y libpython2.7-dev
   - sudo -H apt-get install -qq -y python-minimal
   - sudo -H apt-get install -qq -y python-tk
 
 install:
   - sudo -H apt-get install -qq -y pyqt4-dev-tools
   - sudo -H apt-get install -qq -y python-qt4
-  - sudo -H apt-get install -qq -y python-numpy  # for skimage
+  - sudo -H pip install -U pip setuptools
   - sudo -H python setup.py install
 
 script: