Add D/outputDir  option

Change-Id: I242e205aa7129ecc60cb28d8bdeabaef302a62db
diff --git a/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt b/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt
index aa688d5..9ba9e73 100644
--- a/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt
+++ b/app/src/main/kotlin/de/ids_mannheim/korapxmltools/KorapXmlTool.kt
@@ -219,6 +219,13 @@
     var overwrite: Boolean = false
 
     @Option(
+        names = ["-D", "--output-dir"],
+        paramLabel = "DIR",
+        description = ["Output directory for generated files (default: current directory)"]
+    )
+    var outputDir: String = "."
+
+    @Option(
         names = ["--mem-stats-interval"],
         paramLabel = "N",
         description = ["Log memory and cache statistics every N processed documents (0 disables; default: 0)"]