Add Compress::Zlib to Perl Requires list

README.md

@@ -13,6 +13,7 @@ Will produce files: ./FILENAME.musicdb.dump ./FILENAME.musicdb.out
 ## Perl Requires
 
 Crypt::Cipher  (this has the AES Decryption needed).
+Compress::Zlib  (this uncompresses the library).
 
 If you don't know how to do/get this, you probably just want to translate what I've written to the language you actually want.