docs: update README for gpio drivers

Signed-off-by: deadprogram <[email protected]>

drivers/gpio/README.md

@@ -1,35 +1,35 @@
 # GPIO
 
-This package provides drivers for [General Purpose Input/Output (GPIO)](https://en.wikipedia.org/wiki/General_Purpose_Input/Output) devices . It is normally not used directly, but instead is registered by an adaptor such as [firmata](https://github.com/hybridgroup/gobot/platforms/firmata) that supports the needed interfaces for GPIO devices.
+This package provides drivers for [General Purpose Input/Output (GPIO)](https://en.wikipedia.org/wiki/General_Purpose_Input/Output) devices. It is normally used by connecting an adaptor such as [firmata](https://github.com/hybridgroup/gobot/platforms/firmata) that supports the needed interfaces for GPIO devices.
 
 ## Getting Started
 
 ## Installing
 ```
-go get -d -u github.com/hybridgroup/gobot/... && go install github.com/hybridgroup/gobot/platforms/gpio
+go get -d -u github.com/hybridgroup/gobot/...
 ```
 
 ## Hardware Support
 Gobot has a extensible system for connecting to hardware devices. The following GPIO devices are currently supported:
-
   - Analog Sensor
   - Button
   - Buzzer
   - Direct Pin
-  - Grove Touch Sensor
-  - Grove Sound Sensor
   - Grove Button
   - Grove Buzzer
+  - Grove LED
   - Grove Light Sensor
+  - Grove Magnetic Switch
   - Grove Piezo Vibration Sensor
-  - Grove LED
-  - Grove Rotary Dial
   - Grove Relay
+  - Grove Rotary Dial
+  - Grove Sound Sensor
   - Grove Temperature Sensor
-  - Grove Magnetic Switch Sensor
+  - Grove Touch Sensor
   - LED
   - Makey Button
   - Motor
+  - Proximity Infra Red (PIR) Motion Sensor
   - Relay
   - RGB LED
   - Servo