add gist with custom class

README.md

@@ -55,9 +55,13 @@ inference:
 
 This model is a fine-tuned version of [google/flan-t5-xl](https://huggingface.co/google/flan-t5-xl) on an extended version of the `JFLEG` dataset.
 
+- [here is a custom class wrapper](https://gist.github.com/pszemraj/14f7b13bd2d953176db2371e5d320915) that makes using this with `bitsandbytes` easier
+- the API can be slow due to model size, try [the notebook](https://colab.research.google.com/gist/pszemraj/43fc6a5c5acd94a3d064384dd1f3654c/demo-flan-t5-xl-grammar-synthesis.ipynb)!
+
+<br>
 ![ex](https://i.imgur.com/5QGGF0Z.png)
+<br>
 
-> the API can be slow due to model size, try the notebook!
 
 ## Model description
 
@@ -71,9 +75,6 @@ Compare some of the more severe error examples on [other grammar correction mode
 - Model: `apache-2.0`
 - currently **a work in progress**! While probably useful for "single-shot grammar correction" in many cases, **check the output for correctness, ok?**.
 
-## Training and evaluation data
-
-More information needed
 
 ## Training procedure