Add Circle CI setting

Author: termoshtt

.circleci/config.yml

@@ -0,0 +1,39 @@
+version: 2.0
+
+references:
+  rust_cfg: &rust_cfg
+    docker:
+      - image: rust:1.26
+
+jobs:
+  test-openblas:
+    <<: *rust_cfg
+    steps:
+      - checkout
+      - run:
+          name: test OpenBLAS backend
+          command: cargo test --no-default-features --features=openblas
+
+  test-netlib:
+    <<: *rust_cfg
+    steps:
+      - checkout
+      - run:
+          name: test NetLib backend
+          command: cargo test --no-default-features --features=netlib
+
+  test-intel-mkl:
+    <<: *rust_cfg
+    steps:
+      - checkout
+      - run:
+          name: test Intel MKL backend
+          command: cargo test --no-default-features --features=intel-mkl
+
+workflows:
+  version: 2
+  tests:
+    jobs:
+      - test-openblas
+      - test-netlib
+      - test-intel-mkl