- add labels for DEAD and ALIVE so I can change what character is which
- when return is pressed, start life loop; no more input handling
- change s16b and s16b2 to no longer destroy X (needed for life loop)
- this is an okay first prototype, but it is slow; could use one byte
  for 8 cells but that would've been harder to implement - premature
  optimisation is the root of all evil

memory directly from the get go

- this is so i can just store the current offset and modify the previous
  generation and current generation in one go than changing two separate
  variables

- use GETIN kernal routine for handling input than my old crappy way
- CLRCHN clears keyboard buffer before use
- reset now clears screen
- add subroutines a16b and s16b to add and subtract to num, respectively

- turns out there are kernal routines for handling cursors and printing
  so is the proper way to do things

clear screen and basic key handling, no life related code just yet