- `-skip_ach`: skip downloading & generating achievements and their images
- `-skip_con`: skip downloading & generating controller configuration files
- `-skip_inv`: skip downloading & generating inventory data (`items.json` & `default_items.json`)
* copy the readme of the migration tool after build
* let the migration tool exit with code 1 if nothing was found
* fix a mistake when mixing output from generate_emu_config tool
* ensure output from generate_emu_config tool is written as soon as possible in case another stage threw an exception
* fix a bug when writing .ini, ensure everything is a string
* new readme for the migration tool