Re #9677. Adding algorithms to the index.
Re #9677. Fixing rst markup.
Re #9677. Fixing rst markup.
Re #9677. Adding index information to fit functions.
Re #9677. Added automatic categories from fit functions.
Re #9677. Fixing category tags in fitfunctions.
Merge remote-tracking branch 'origin/feature/9677_algs_and_fit_index'