Use Circle CI for faster builds. (#181)

Move to Circle CI from Travis CI.

.circleci/config.yml

@@ -0,0 +1,44 @@
+version: '2'
+
+
+jobs:
+  build:
+    docker:
+      - image: circleci/python:3
+    steps:
+        - checkout
+        - setup_remote_docker
+        - run:
+            name: Setup Environment
+            command: source setup_env.sh
+        - run:
+            name: Install Docker Compose
+            command: sudo pip install docker-compose
+
+        - run:
+            name: Building Container Images
+            command: ./build.sh
+
+        - run:
+            name: Generate Tests
+            command: bash tests/generate_tests.sh
+
+        - run:
+            environment:
+              DB: postgres
+            name: Postgres Tests
+            command: bash tests/test.sh
+
+        - run:
+            environment:
+              DB: mysql
+            name: MySQL Test
+            command: bash tests/test.sh
+
+        - deploy:
+            environment:
+              REGISTRY: QUAY
+            command: |
+                    if [ "${CIRCLE_BRANCH}" == "master" ]; then
+                      bash .travis/deploy.sh
+                    fi