Updated TODO list for next steps of radio.c

Implemented radio.c/radio_get_payload ...

Not yet tested

Implemented a better HRF_readfifo_burst. ...

This has facilities to read a fixed payload, or a count byte preceeded payload.

Framework for FSK receive in place

Started working through new FSK receiver architecture

Tested with MiHome adaptor plus, new FSK transmitter works fine

FSK Transmit coded, ready for test

Restructured switch.py so we have a tx-only test. ...

This is in preparation for pushing the FSK transmitter into radio.c

Refactored so that we can create a tx-only switch loop tester. ...

This will be useful for integrating a new FSK transmitter without receiver

Tested on Raspberry Pi, switch, monitor, and legacy work with spi scaffold

radio2.py offers temporary spi interface for radio.py ...

Tested on mac only.

Updated README to reflect recent advances

Merge branch 'master' of https://github.com/whaleygeek/pyenergenie ...

Test script updated

Build of radio_rpi.so updated

Legacy test passed

Defined manual release tests

Removed experimental arduino work

Fixed failed merge

Merge branch 'long-tx'

Tested with a house address captured from an Energenie hand controller. ...

Captured the bit pattern on GnuRadio and hand decoded.
Address was 0xA0170
Programmed this into legacy.py, and plugs previously learned
to the hand controller switched correctly

Tested with different house codes, works fine

Improved configurability of message repeat patterns. ...

Tested with different repeat lengths.
Optimum seems to be 8 inner, 1 outer transmits

Turned off TRACE on raspberry pi build

Tested with learning mode. ...

Works with all 4 switch patterns.
Can now independently switch 4 switches.
Some occasional RF reliability problems that need measuring.

Implemented mode switching logic. ...

This is so you can just say radio_standby()
Then radio_transmit() and it pops to standby at end of transmit.
Or, radio_receive()
Then radio_transmit() pops back to receive at the end.
Also massive tidy up and trimming out old comments.

Improved flow of code, specifically radio_transmit() ...

Pushes previous mode and restores at end of transmit.
This should auto-return to standby or receive as appropriate.
This will make it easier to implement mode hopping schemes later.

Simulation gets further now due to gpio_sim detection

Started design of new long payload transmitter

Initial design of new radio transmit scheme

Created links to issues for all items on the main TODO list