A version of BlueScopeEvent that reports by indication rather than by
DMA.  This will be lower performance, but much easier to set up and use.
strip out dma hardware, change names to add PIO
remoe ack2
convert for pio use
add bluescopeeventpio
fix bugs and compilation errors, test now works
Merge branch 'master' of https://github.com/cambridgehackers/connectal
Merge branch 'master' of https://github.com/cambridgehackers/connectal