Documentation and new code

The final code used to test Firefly IoT that sends accurate data quickly
to the user. Updated imp device code to filter the information coming
from the arduino so the imp can send sensible information. Updated the
Fritzing diagram to reflect the new lcd shield that is placed on the
system.
Firefly IoT Update

Version 2.0 of Firefly IoT. Includes the Arduino code to operate the lcd
screen. Updated the imp to accurately collect data from arduino and have
it read to send the seconds the button is pressed. Updated the Fritzing
diagram to reflect the changed and addition to the IoT system.