added links to deeper readmes

Author: biomurph

README.md

@@ -2,9 +2,9 @@
 This is the home for example code that connects Pulse Sensor to Raspberry Pi
 # Raspberry Pi 3 Ways
 There are currently 3 examples. Check back for more soon!
-### Raspberry Pi + Arduino
+### [Raspberry Pi + Arduino](https://github.com/WorldFamousElectronics/Raspberry_Pi/blob/master/PulseSensor_Arduino_Pi/PulseSensor_Arduino_Pi.md)
 Connect your Arduino to your Pi and start streaming Pulse Sensor data!
-### Raspberry Pi + Processing
+### [Raspberry Pi + Processing](https://github.com/WorldFamousElectronics/Raspberry_Pi/blob/master/PulseSensor_Processing_Pi/PulseSensor_Processing_Pi.md)
 Connect your Pulse Sensor to your Pi via ADC and visualize in Processing!
-### Raspberry Pi + C 
-C code that reads your Pulse Sensor via ADC!
+### [Raspberry Pi + C](https://github.com/WorldFamousElectronics/Raspberry_Pi/blob/master/PulseSensor_C_Pi/PulseSensor_C_Pi.md) 
+C code that reads your Pulse Sensor via ADC!