Initial Development (#1)

This project now contains:
- A generic JVM document library (with Kotlin extensions on the JDBC `Connection` object)
- A Groovy library which adds extension methods to the `Connection` object
- A Scala library, which uses native Scala collections and adds Scala-style extension methods to the `Connection` object
- A Kotlin library which uses `kotlinx.serialization` (no reflection, reified generic types) along with `Connection` extensions

Reviewed-on: #1

.gitignore

@@ -26,3 +26,9 @@ replay_pid*
 
 # Kotlin Gradle plugin data, see https://kotlinlang.org/docs/whatsnew20.html#new-directory-for-kotlin-data-in-gradle-projects
 .kotlin/
+
+# Temporary output directories
+**/target
+
+# Maven Central Repo settings
+settings.xml