Update readme

README.md

@@ -3,11 +3,20 @@
 ## Usage
 
 ```shell script
-process-bpvf /path/to/ofxfile.ofx
-# Or
-process-revolut /path/to/csvfile.csv
+Usage: ynab [OPTIONS] COMMAND [ARGS]...
+
+Options:
+  --version   Show the version and exit.
+  -h, --help  Show this message and exit.
+
+Commands:
+  bpvf     Process BPVF bank statement (OFX)
+  ce       Process CE bank statement (OFX)
+  config
+  revolut  Process Revolut bank statement (CSV)
 ```
 
-It will write a `processed` file in the same folder with the same extension.
+All transactions will be pushed to YNAB. If this is your first time using the script,
+it will open a generated config file for you to fill up.
 
-It will not overwrite the original file.
+The account and budget UUID are found in the YNAB url when using the web app.