update README.md to beta 3

README.md

@@ -51,6 +51,12 @@ This is a Proof of Concept with the minimum necessary features.
 So there is certainly a lot left to do.
 
 ## Version history
+### beta 3
+- only unrar if rar files are present
+- refactoring: move common functions to separate functions.go
+- use X-Nxg article header for yenc decoding (allows yenc header obfuscation when uploading). Reverts change in beta 2 (only read body instead of whole article) because X-Nxg header is required.
+- fix for wrong unrar error on missing password
+
 ### beta 2
 - some heavy refactoring
 - only read body instead of whole article