file drop support

- Add a folder where you can drop Zip files which will then be
  extracted on the fly and ingsted.
- CsvReaderSettings now contain TagMatcher that are applied to the
  first line and can be used to extract additional tags.
- Update to jdk 16 so that we can have records.

build.gradle

@@ -10,7 +10,7 @@ plugins {
 
 ext {
 
-  javaVersion=14
+  javaVersion=16
 
   version_log4j2= '2.14.1' // keep in sync with spring-boot-starter-log4j2
   version_spring = '2.5.3'