- begin writing main function
- wrote draft for hiding one column
- TODO: make hide cols function hide multiple columns at once
- TODO: write invisibility spec part

- bug prevents function from working, not found yet

- new (better I hope) algorithm added to TODOs
- add TODOs

- mk field hiding work in MISC field
- refactor field hiding code
- add rm from invisibility spec
- add keybindings to keymap
- add keybindings to README

- add forward-char to save a constant time check for every line
  (without it the hide-fields mecanism would call not-looking-at-token
  at the end of line, and then forward it, and call it again; now it
  calls it once and does its job
- make tabs and newline buffers between areas with different invisible
  property values; this way when you are editing a something right next to
  a collapsed field the inserted text doesn't become part of the hidden field