Count chars lost due to buffer overrun.
Refactor buffer class into buffer class and bufferPool class.
Write and flush methods for buffer and bufferPool.
Handle SD LED in buffer class, use direct port manipulation.
Fix bufferPool::flush
Increase buffers to 512 bytes.
Direct port manipulation for heartbeat LED.
Change to SPI_FULL_SPEED.
Drop 300 baud.
Update README file.