Created README pointing to our paper and purpose of the model.

README.md

@@ -0,0 +1,6 @@
+This model has been fine-tuned for the task described in the paper *Topical Change Detection in Documents via Embeddings of Long Sequences* and is our best-performing base-transformer model. You can find more detailed information in our GitHub page for the paper [here](https://github.com/dennlinger/TopicalChange), or read the [paper itself](https://arxiv.org/abs/2012.03619).
+
+The training task is to determine whether two text segments (paragraphs) belong to the same topical section or not. This can be utilized to create a topical segmentation of a document by consecutively predicting the "togetherness" of two models.
+
+
+Note that this model is *not* trained to work on classifying single texts, but only works with two (separated) inputs.