update TODO as current status is.. better.
adjust todo some more.
main.c: display the current tab number.
revert a bunch of commits that weren't ready for prime time

664c5a23: Revert "compat: csi parameters are always decimal"
3694c88c: Revert "compat: handle cursor-controls chars in ESC sequences"
16e143f9: Revert "compat: add margin top support on Origin mode"
4daccf1f: Revert "compat: add ugly testing code to change between 80/132 cols"
d5be8a64: Revert "add termio_win_get();"
cff21ea5: Revert "compat: only clear cells when scrolling to add text"
13a11e5a: Revert "compat: add some csi dec private modes TODOs"
65f07f77: Revert "handle DCS status string requests"