Revamp of the tool (UI & Core) & new features
-removed local methods to use the one in RLToolkit
-added support for NxN images, from 1x1 to 8x8 using custom widgets
-added support for the configuration manager to save and load preferences
-better logging
-removal of the static/hardcoded 4 'FileSelector'
-added a preference for size and ratio keeping
-update to the Readme.md file