WIP: finding tables by numbers

TODO:

- [ ] Needs further testing on different cases
- [ ] Needs configuration
- [ ] May need to adjust thresholds.. OR.. (next line)
- [ ] Consider doing thresholding in the hat function for row finding
- [ ] Consider doing column finding on "words", somehow. (Maybe with a different hat function)
- [ ] Consider assigning text to cells according to words rather than glyphs

WORK IN PROGRESS. Do not merge.