Improve Arduino sketch to use timers throughout and output photodiode reading
Fix timing error for interflash delay
Switch to using three timers to try and fix LED delay issues
Change serial outputs so they are all of the form $time $object $reading

This will make later processing in Python somewhat simpler
Increase Arduino baud rate
Add simple Python script to read data from Arduino and save to TSV files
Change red LED pin to 12 before this bites us later...
Add README