add encrypted credentials for gae site and decrypt on travis

.travis.yml

@@ -28,13 +28,16 @@ env:
 
 # Setup anaconda
 before_install:
-  - if [ ${TRAVIS_PYTHON_VERSION:0:1} == "2" ]; then wget http://repo.continuum.io/miniconda/Miniconda-3.8.3-Linux-x86_64.sh -O miniconda.sh; else wget http://repo.continuum.io/miniconda/Miniconda3-3.8.3-Linux-x86_64.sh -O miniconda.sh; fi
-  - chmod +x miniconda.sh
-  - ./miniconda.sh -b
-  - export PATH=/home/travis/anaconda/bin:/home/travis/miniconda/bin:$PATH
-  - conda update --yes conda
-
 # Install packages
+- openssl aes-256-cbc -K $encrypted_93066031461c_key -iv $encrypted_93066031461c_iv
+  -in credentials.tar.gz.enc -out credentials.tar.gz -d
+- if [ ${TRAVIS_PYTHON_VERSION:0:1} == "2" ]; then wget http://repo.continuum.io/miniconda/Miniconda-3.8.3-Linux-x86_64.sh
+  -O miniconda.sh; else wget http://repo.continuum.io/miniconda/Miniconda3-3.8.3-Linux-x86_64.sh
+  -O miniconda.sh; fi
+- chmod +x miniconda.sh
+- ./miniconda.sh -b
+- export PATH=/home/travis/anaconda/bin:/home/travis/miniconda/bin:$PATH
+- conda update --yes conda
 install:
   - conda install --yes pip python=$TRAVIS_PYTHON_VERSION numpy scipy matplotlib cython ipython nose vtk sphinx
   - pip install nose-cov python-coveralls