Revert "Added Relay to Main Program"

This reverts commit b01228c25baa74b6dddec7edd8b6fa9407b0bb3f.
Fixed Major Issues

LED now flashes for different scenarios:
Solid - Smoke Detected/Smoke Detector Not Working
On off regularly - Manual Call Point Switch Disconnected
Long off then On - Press To Exit Switch Disconnected
Added Interrupt for Smoke Sensor
Changed Interrupt 0 to RISING edge
Removed lots of unnecessary code & tidied it up