- Add missing crawls_crawlschedule table definition to SCHEMA_0_8 in test file
- Record all replaced dev branch migrations (0023-0074) for squashed migration
- Update 0024_snapshot_crawl migration to depend on squashed machine migration
- Remove 'extractor' field references from crawls admin
- All 45 migration tests now pass (0.4.x, 0.7.x, 0.8.x, fresh install)