Input-async

[mitra42]

Attempt at doing input asynchronously as synchronous failed as did simple attempts to yield etc.

• [x] Rewrite ?RX
• [x] Rewrote !IO to set it up
• [x] Work in from "run" as async thru threadtoken to RX?
• [x] Work out from run
• [x] Fix nesting of Run (maybe if (IP) await threadtoken else await run - but should be ok since have test for IP===0
• [x] Figure out outside loop

THEN

• [x] TODO-IO TODO-INPUT TODO-OUTPUT
• [x] Check efficiency - at first working it was 95% of a CPU even when looping waiting
• [x] Maybe event driven top end - "on('data') - see #26

[mitra42]

Efficiency problems - crashes with a stack overflow

• [x] on WebStorm fails in definition of "SEE"
• [x] Try in shell - it works
  • works in shell, (hit return while running) real(0m98 user 9.8 sys 0.24)
  • adding setImmediate in run() pushes to user 15.7s sys 1.8
• [X] Check if problems if remove NUF? in SEE
  • Not reqd - fixed with other parts
• [x] Look if threadtoken could return a promise instead of one more stack layer
• SKIP Flag which code routines are async, dont "await" unless they are
  • threadtoken does that nicely, only awaiting if Promise returned
• [x] Make all code sync and only await in top loop - say every 100 cycles
  • except couldnt make it sync cos need to pause within run()