add initial travis ci file

.travis.yml

@@ -0,0 +1,26 @@
+sudo: false
+notifications:
+  email: false
+language: python
+python:
+  - "2.7"
+  - "3.6"
+env:
+  - DEPS="pip nose six protobuf>=3.6.0 absl-py opt_einsum numpy scipy"
+  - DEPS="pip nose six protobuf>=3.6.0 absl-py opt_einsum numpy"
+before_install:
+  - if [[ "$TRAVIS_PYTHON_VERSION" == "2.7" ]]; then
+      wget https://repo.continuum.io/miniconda/Miniconda2-latest-Linux-x86_64.sh -O miniconda.sh;
+    else
+      wget https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh -O miniconda.sh;
+    fi
+  - bash miniconda.sh -b -p $HOME/miniconda
+  - export PATH="$HOME/miniconda/bin:$PATH"
+  - conda update --yes conda
+  - conda config --add channels conda-forge
+install:
+  - conda install --yes python=$TRAVIS_PYTHON_VERSION $DEPS
+  - pip install -v .
+script:
+  - cd tests
+  - PYTHONPATH=. JAX_NUM_GENERATED_CASES=10 nosetests