gitignore: ignore scripts directory

This directory is useful to put scripts for testing during development,
but we will never commit scripts here; any scripts we want to ship in
production will go in src/main/resources of the relevant component.

Author: ctrueden

.gitignore

@@ -9,3 +9,4 @@ target
 *.iml
 /app/ImageJ.app/
 nb-configuration.xml
+/scripts/