Refactored fetch from URLs and instances.
Change API delay to be in calls per hour.
Improved check_followed_severity() behaviour.
Updated sample config to include new format.
Added support for per-instance-source import_fields.
BlockSeverity of 'suspend' implies reject_media and reject_reports.
an instance has followers of accounts on
a to-be-blocked domain.
Refactored the change detection code.
Fixed a bug in config of intermediate blocklists saving.
Updated README documentation.
Updated sample config.
Addresses #5
Support for 'noop' severity for removing a block.
Support for mergeplan as commandline parameter.
Support for mergeplan as config file option.
Added --dryrun commandline option.