Added coverage collection to the repo

Author: bhermann

.travis.yml

@@ -1,3 +1,8 @@
 language: scala
 scala:
-  -  2.12.4
+  -  2.12.4
+script:
+  - 'if [ "$TRAVIS_PULL_REQUEST" != "false" ]; then sbt ++$TRAVIS_SCALA_VERSION test; fi'
+  - 'if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then sbt ++$TRAVIS_SCALA_VERSION coverage test coverageReport coverageAggregate codacyCoverage; fi'
+after_success:
+  - 'if [ "$TRAVIS_PULL_REQUEST" = "false" ]; then bash <(curl -s https://codecov.io/bash); fi'