add json serializer lib (prepare #18)

README.md

@@ -3,26 +3,26 @@
 Minimalist CLI email client, written in Rust.
 
 ```bash
-himalaya --help
-```
-
-```help
 Himalaya 0.1.0
 soywod <clement.douin@posteo.net>
 📫 Minimalist CLI email client
 
 USAGE:
-    himalaya [SUBCOMMAND]
+    himalaya [OPTIONS] [SUBCOMMAND]
 
 FLAGS:
     -h, --help       Prints help information
     -V, --version    Prints version information
 
+OPTIONS:
+    -a, --account <STRING>    Name of the config file to use
+
 SUBCOMMANDS:
     attachments    Downloads all attachments from an email
     forward        Forwards an email
     help           Prints this message or the help of the given subcommand(s)
-    list           Lists all available mailboxes
+    list           Lists emails sorted by arrival date
+    mailboxes      Lists all available mailboxes
     read           Reads text bodies of an email
     reply          Answers to an email
     search         Lists emails matching the given IMAP query