Draft: Replace mqtt handling with RagConnect

• WIP: correct transformation of state to String and back

Closes #48

buildSrc/src/main/groovy/eraser.java-ragconnect-conventions.gradle

@@ -2,6 +2,12 @@ plugins {
   id 'eraser.java-jastadd-conventions'
 }
 
+configurations {
+    ragconnect
+}
+
 dependencies {
-  compileOnly group: 'de.tudresden.inf.st', name: 'ragconnect', version: '0.3.1'
+    // TODO: use upstream ragconnect version once available
+//  ragconnect group: 'de.tudresden.inf.st', name: 'ragconnect', version: '1.0.0'
+    ragconnect fileTree(include: ['ragconnect.base-fatjar-1.0.1.jar'], dir: './libs')
 }