Merge branch 'patch-2' into 'master'

Use full gpg-key ID (closes #21)

Closes #21

See merge request !60

Scala.gitlab-ci.yml

@@ -9,7 +9,7 @@ before_script:
   - apt-get install apt-transport-https -yqq
   # Add keyserver for SBT
   - echo "deb http://dl.bintray.com/sbt/debian /" | tee -a /etc/apt/sources.list.d/sbt.list
-  - apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 642AC823
+  - apt-key adv --keyserver hkp://keyserver.ubuntu.com:80 --recv 2EE0EA64E40A89B84B2DF73499E82A75642AC823
   # Install SBT
   - apt-get update -yqq
   - apt-get install sbt -yqq