Identify and encode footnotes / endnotes

[tfmorris]

Some texts have footnotes at the bottom of the page which need to, at a minimum, be identified and moved out of line. Better would be to split them from each other and associate them with the reference callout.

A relatively complex example can be seen on this page: http://access.bl.uk/item/viewer/lsidyv2b04fe9b#ark:/81055/vdc_0000000006D1.0x000011

It uses symbols for the the references (which are misrecognized by the OCR) and is formatted into a variable number of columns (2 or 3, depending on the line). The misrecognized typographical symbols in the body of the text represent noise added to the text.