add readme.md placeholder
add support for ino build system
replace delay_ms, delay_us and restore interrupts
Report game state

Serial is used by default but other modes could also
be added easily. For instance an exteral display can
be added via SPI or I2C. You can easily disable the
LED or BUTTON messages by selecting the appropriate
define.

LED messages should start with '*' followed by the
set of RGBY characters that are lit (others are
assumed to be off).

BUTTON messages should start with '#' and similarly
followed by the RGBY characters that are pressed.
check for button state during delay_ms

The game state can be be updated while waiting to properly
reflect which buttons are pressed. This enables accurate
debugging or Serial game play.
listen for Serial connections

Serial uses power so don't transmit unless somebody is listening.
initial commit of empty Simon Says app
skeleton code for Simon Says app
draw simon says board and message
update readme to include app details
add menu to select Bluetooth device
update readme and include app/firmware build instructions