Add build for Python 3.6.

Author: mcflugen

.travis.yml

@@ -1,8 +1,8 @@
 env:
   matrix:
   - TRAVIS_PYTHON_VERSION="2.7"
-  - TRAVIS_PYTHON_VERSION="3.4"
   - TRAVIS_PYTHON_VERSION="3.5"
+  - TRAVIS_PYTHON_VERSION="3.6"
   global:
     - CONDA_PREFIX=$HOME/miniconda
     - MINICONDA_URL_BASE="https://repo.continuum.io/miniconda/Miniconda3-latest"