more functional and better readme

README.md

@@ -1,3 +1,25 @@
 # Cat2Text-rs
 
 This is a port of [Cat2Text](https://github.com/askiiart/Cat2Text) to Rust, with extra functionality, better documentation, and support for using it as a library as well.
+
+## Base4 Format
+
+Using the original base4 format, it works like this. First off, each word is equal to a value in base 4:
+
+| Value | Cat sound |
+| ----- | --------- |
+| 0     | meow      |
+| 1     | mrrp      |
+| 2     | mreow     |
+| 3     | mrow      |
+
+Then, the text is converted into lowercase
+
+## Limitations
+
+This currently only supports lowercase text in the latin alphabet without numbers or anything - however, using `cat2text::core`, you can convert anything to meows, as long as you can put it in integers - which, you can.
+
+## TODO
+
+- Add functionality for converting `Vec<u8>` to cat.
+- Add more bases - adaptable base option?