Quickly Annotate Your Machine Learning Dataset with One Weird Trick (It's Lisp)

TL;DR - I wrote annotation-mode, which is a emacs minor mode for annotating text documents for machine learning purposes. Recently at work I had to annotate some text documents for a piece of NLP work. The annotation involves marking regions of the text with a category, as well as a rectangle which represents the region. At first I thought to build a webapp to do the annotation. The webapp would load a text file would be drawn onto a canvas object.