Adds SDKMan so we can install Kotlin

removes JAVA_HOME as its now managed by SDKMAN

scripts/setupKotlin.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+
+curl -s "https://get.sdkman.io?rcupdate=false" | bash
+source "$HOME/.sdkman/bin/sdkman-init.sh" || sdk version || echo "Try running \"source \
+\"$HOME/.sdkman/bin/sdkman-init.sh\"\""
+
+ yes | sdk install kotlin || true
+ yes | sdk install kscript || true
+ yes | sdk install java 11.0.13-tem || true
+sdk default java 11.0.13-tem || true
+yes | sdk install gradle || true
+sdk default gradle || true