improve README and add license

LICENSE

@@ -0,0 +1,11 @@
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.

README.md

@@ -1 +1,12 @@
-# cuda-travis
+[license-badge]: https://img.shields.io/badge/License-Apache%202.0-blue.svg 
+[license-link]: https://opensource.org/licenses/Apache-2.0
+
+[travis-badge]: https://img.shields.io/travis/jeremad/cuda-travis/master.svg?label=Build
+[travis-link]: https://travis-ci.org/jeremad/cuda-travis
+
+[![License][license-badge]][license-link]
+[![Build][travis-badge]][travis-link]
+
+# cuda-travis
+
+An example CUDA project that can be built (and only built) using travis CI.