* Added abstract helper interface and implemented it for all storage backends
* Moved storage client initializations also to helper classes
* Fixed ssh init issue
* Moved script parameter to helper struct to simplify script init.
* Created sub modules. Enhanced abstract implementation.
* Fixed config issue
* Fixed declaration issues. Added config to interface.
* Added StorageProviders to unify all backends.
* Cleanup, optimizations, comments.
* Applied discussed changes. See description.
Moved modules to internal packages.
Replaced StoragePool with slice.
Moved conditional for init of storage backends back to script.
* Fix docker build issue
* Fixed accidentally removed local copy condition.
* Delete .gitignore
* Renaming/changes according to review
Renamed Init functions and interface.
Replaced config object with specific config values.
Init func returns interface instead of struct.
Removed custom import names where possible.
* Fixed auto-complete error.
* Combined copy instructions into one layer.
* Added logging func for storages.
* Introduced logging func for errors too.
* Missed an error message
* Moved config back to main. Optimized prune stats handling.
* Move stats back to main package
* Code doc stuff
* Apply changes from #136
* Replace name field with function.
* Changed receiver names from stg to b.
* Renamed LogFuncDef to Log
* Removed redundant package name.
* Renamed storagePool to storages.
* Simplified creation of new storage backend.
* Added initialization for storage stats map.
* Invert .dockerignore patterns.
* Fix package typo
