Update README, CHANGELOG

CHANGELOG.md

@@ -8,13 +8,28 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## Unreleased
 
 ### Added
-- Support for concurrent downloads
-- Support for proper config files
+- Proper config files
+- Concurrent crawling
+- Crawl external ILIAS links
+- Crawl uploaded exercise solutions
+- Explain what PFERD is doing and why (`--explain`)
+- More control over output (`--status`, `--report`)
+- Print report after exiting via Ctrl+C
+- Store crawler reports in `.report` JSON file
+- Extensive config file documentation (`CONFIG.md`)
+- Documentation for developers (`DEV.md`)
 - This changelog
 
 ### Changed
 - Rewrote almost everything
+- Better error messages
 - Redesigned CLI
+- Redesigned transform rules
+- ILIAS crawling logic (paths may be different)
+- Better support for weird paths on Windows
+- Set user agent (`PFERD/<version>`)
 
 ### Removed
 - Backwards compatibility with 2.x
+- Python files as config files
+- Some types of crawlers