New panel with useful links about methods.

[romanhaa]

• How UMAP works: https://umap-learn.readthedocs.io/en/latest/how_umap_works.html
• How to interpret distances in UMAP : https://github.com/lmcinnes/umap/issues/92
• How to effectively use t-SNE: https://distill.pub/2016/misread-tsne/
• How to interpret distances in t-SNE: https://stats.stackexchange.com/questions/263539/clustering-on-the-output-of-t-sne
• Problems of t-SNE: https://stats.stackexchange.com/questions/270391/should-dimensionality-reduction-for-visualization-be-considered-a-closed-probl/270414