This is a breaking release, since most of the configuration has been
moved to a config file.
* added "analyse" cli command
* markusressel/2_move_instead_of_delete
* added preference to enable/disable auto index creation
* Feature/5 file config
* moved most of the configuration parameters to the config
* added option to disable removal of empty folders
* 1 remove folders only if empty due to deduplication
* better error handling while threading
* better summary output
* automatically detect elasticsearch version
* support both v6 and v7 (needs patches in image-match too)
* elasticsearch fix for new hit count format
* Feature/3 run as service
* Feature/4 docker
* feature/12_statistics