Merge branch 'release-0.3.1' into 'master'

.gitlab-ci.yml

.gitmodules

libs/jastadd2.jar

pages/docs/changelog.md

pages/mkdocs.yml

ragconnect.base/build.gradle

ragconnect.base/src/main/jastadd/Analysis.jrag

ragconnect.base/src/main/jastadd/Configuration.jadd

ragconnect.base/src/main/jastadd/NameResolution.jrag

ragconnect.base/src/main/jastadd/Navigation.jrag

ragconnect.base/src/main/jastadd/RagConnect.relast

...onnect.base/src/main/jastadd/intermediate/Generation.jadd

ragconnect.base/src/main/jastadd/intermediate/Mappings.jrag

...in/jastadd/intermediate2mustache/MustacheNodesToYAML.jrag

ragconnect.base/src/main/jastadd/mustache

ragconnect.base/src/main/jastadd/parser/Preamble.parser

ragconnect.base/src/main/jastadd/parser/RagConnect.parser

...c/main/java/org/jastadd/ragconnect/compiler/Compiler.java

...main/java/org/jastadd/ragconnect/compiler/SimpleMain.java

ragconnect.base/src/main/resources/MqttHandler.jadd