more updates to readme and moves demo.png

.gitignore

@@ -2,4 +2,4 @@
 **/*.rs.bk
 /qr-codes/
 /qr-codes/*
-*.png
+/*.png

README.markdown

@@ -30,18 +30,15 @@ Know that [KeePassXC version 2.4.0 and above](https://keepassxc.org/) can genera
 - To **encode** a secret and create a QR code, run `cargo run`
 - To **decode** a secret from an existing QR code image, run `cargo run -- <qr_code_image_file_path.png>`
 
-![Demo](demo.png)
+![Demo](demo/demo.png)
 
 
 ## Notes
 
-
 Before I wrote this code, I wrote [a blog post](https://sts10.github.io/2018/11/26/totp-uris-qr-codes-2-factor.html) that might help you understand the problems I'm interested in here. 
 
 ## To Do 
 
-Add ability to generate a few 6-digit codes, allowing users to confirm everything went right. See [this function](https://github.com/Skarlso/totp/blob/master/src/generator.rs#L9) for clues on how to do this.
-
-### Testing?
-
-Not sure how to go about testing the functionality of this script as is. If you have ideas, create a PR or issue! 
+- [x] Add ability to generate a few 6-digit codes, allowing users to confirm everything went right. See [this function](https://github.com/Skarlso/totp/blob/master/src/generator.rs#L9) for clues on how to do this.
+- [ ] Big refactor of the reading image code
+- [ ] Make this a real CLI using structopt or Clap