add test coverage, add License link to README, use common tags instea…

…d of log

Signed-off-by: Sergei Malafeev <sergeymalafeev@gmail.com>

.travis.yml

@@ -29,6 +29,9 @@ branches:
   except:
     - /^[0-9]/
 
+after_success:
+- mvn jacoco:report coveralls:report
+
 env:
   global:
   # Ex. travis encrypt BINTRAY_USER=your_github_account

README.md

@@ -1,4 +1,4 @@
-[![Build Status][ci-img]][ci] [![Released Version][maven-img]][maven]
+[![Build Status][ci-img]][ci] [![Coverage Status][cov-img]][cov] [![Released Version][maven-img]][maven]
 
 # OpenTracing JDBI Instrumentation
 OpenTracing instrumentation for JDBI.
@@ -67,7 +67,13 @@ OpenTracingCollector.setParent(statement, parent);
 List<Map<String, Object>> results = statement.mapToMap().list();
 ```
 
+## License
+
+[Apache 2.0 License](./LICENSE).
+
 [ci-img]: https://travis-ci.org/opentracing-contrib/java-jdbi.svg?branch=master
 [ci]: https://travis-ci.org/opentracing-contrib/java-jdbi
+[cov-img]: https://coveralls.io/repos/github/opentracing-contrib/java-jdbi/badge.svg?branch=master
+[cov]: https://coveralls.io/github/opentracing-contrib/java-jdbi?branch=master
 [maven-img]: https://img.shields.io/maven-central/v/io.opentracing.contrib/jdbi-opentracing.svg
 [maven]: http://search.maven.org/#search%7Cga%7C1%7Cjdbi-opentracing