In order to run this program successfully you must first install the WiringPi library on your raspberry pi.

Upload the arduino sketch to your Arduino and ensure that your wires are connected to the correct ports in order to
send and receive information.

Next, run the "project" file in order to set up your server first. This must be fun FIRST in order for the program
to run successfully. If it is the not, there will be an error on connecting and you will have to wait a few seconds
before the programs will be compatible with one another again.

Lastly, run the "client" file and you should see confirmation of the connection to the project file through a print statment.
The print statment should read "reopened, polling" to indicate that it is waiting for a state change from the Arduino, 
signalling someone entered or left the room.