run test_doc.py on Travis

nosetests skips the tests in this file, so run it separately.

Author: grlee77

.travis.yml

@@ -72,14 +72,16 @@ script:
         pip wheel . -v
         pip install PyWavelets*.whl -v
         pushd demo
-        nosetests pywt
+        nosetests -v pywt
+        python ../pywt/tests/test_doc.py
         popd
     elif [ "${USE_SDIST}" == "1" ]; then
         python setup.py sdist
         # Move out of source directory to avoid finding local pywt
         pushd dist
         pip install PyWavelets* -v
-        nosetests pywt
+        nosetests -v pywt
+        python ../pywt/tests/test_doc.py
         popd
     elif [ "${REFGUIDE_CHECK}" == "1" ]; then
         pip install -e . -v