Main system testing

[saloni1307]

• [x] Gesture sensor turns on after pressing PB1 on server
• [x] Pulse oximeter turns on and takes samples only after gesture is detected
• [x] Heart rate readings taken after right swipe
• [x] Oxygen level readings taken after left swipe
• [x] Temperature readings taken after up swipe
• [x] Gesture turns off after down swipe
• [x] Client receives indications for each readings based on respective reading on server
• [x] Client displays alert using led if ratings out of acceptable range

[Mich2899]