Update README.md

Added info about obfuscating file size and folder structure (two very important features that should be known!)

README.md

@@ -20,6 +20,8 @@ Download native binaries of Cryptomator on [cryptomator.org](https://cryptomator
 - Totally transparent: Just work on the virtual drive as if it were a USB flash drive
 - AES encryption with 256-bit key length
 - Filenames get encrypted, too
+- Folder structure gets obfuscated
+- File size gets obfuscated with random padding.
 - Use as many vaults in your Dropbox as you want, each having individual passwords
 
 ### Privacy