Add travis CI based on nbval

Author: vidartf

.gitignore

@@ -13,8 +13,15 @@ pythreejs/static/
 # OS X
 .DS_Store
 
-
+# Autogen files
 *_autogen.py
 *.autogen.js
 js/src/**/index.js
 pythreejs/**/__init__.py
+
+# Test and coverage
+.coverage
+.cache
+htmlcov/
+
+

.travis.yml

@@ -0,0 +1,17 @@
+language: python
+python:
+  - 3.5
+  - 3.4
+  - 2.7
+sudo: false
+cache:
+  pip: true
+  directories:
+    - ~/.npm  # NPM cache
+before_install:
+  - pip install -U pip setuptools
+  - nvm install 6
+install:
+  - pip install --upgrade -e ".[test, examples]"
+script:
+  - py.test -l --nbval-lax --current-env examples

setup.py

@@ -52,6 +52,16 @@
         'ipywidgets>=7,<8',
         'ipydatawidgets>=1.1.1'
     ],
+    'extras_require': {
+        'test': [
+            'nbval',
+        ],
+        'examples': [
+            'scipy',
+            'matplotlib',
+            'scikit-image'
+        ],
+    },
     'packages': find_packages(),
     'zip_safe': False,
     'cmdclass': cmdclass,