Make migration and generator more pretty
Move instance methods to own module

Extract configuration object
Extract modules from instance methods
Extract OptionItem and using it
Extract RelationReflector
Refactor RelationReflector
Rename to InstanceMethods
Completed moving code to CountFixer
Prettify code and remove useless comments
Some beautify fix procedure
WIP refactoring CountFixer
Fully refactored CountFixer
Extracting updating counts to class
Final refactoring