Switch back to conda, use pip to install flask dependencies

.travis.yml

@@ -3,12 +3,24 @@ python:
   - 2.7
   - 3.5
   - 3.6
-  - 3.7
 before_install:
-  # used to build pycurl
-  - sudo apt-get -y install libgnutls-dev
+  ## courtesy of http://conda.pydata.org/docs/travis.html
+  - if [[ "$TRAVIS_PYTHON_VERSION" == "2.7" ]]; then
+    wget https://repo.anaconda.com/miniconda/Miniconda2-latest-Linux-x86_64.sh -O miniconda.sh;
+    else
+    wget https://repo.anaconda.com/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh;
+    fi
+  - bash miniconda.sh -b -p $HOME/miniconda
+  - export PATH="$HOME/miniconda/bin:$PATH"
+  - hash -r
+  - conda config --set always_yes yes --set changeps1 no
+  - conda update --yes conda
+  - conda info -a
 install:
-  - pipenv install --dev --skip-lock
+  - conda config --add channels conda-forge
+  - conda create -q -n test-environment python=$TRAVIS_PYTHON_VERSION obspy pycurl nose flake8 coverage webtest
+  - source activate test-environment
+  - pip install authlib flask flask-login flask-migrate flask-session flask-sqlalchemy psycopg2-binary
 script:
   - flake8 --config=.flake8 bin/ geomagio/ test/
   - nosetests -v .