Added categories to libraries

Fix #3812

Author: cmaglie

Diff for: libraries/HID/library.properties

@@ -4,5 +4,6 @@ author=Arduino
 maintainer=Arduino <[email protected]>
 sentence=Module for PluggableUSB infrastructure. Exposes an API for devices like Keyboards, Mice and Gamepads
 paragraph=
+category=Communication
 url=http://www.arduino.cc/en/Reference/HID
-architectures=sam
+architectures=sam

Diff for: libraries/SPI/library.properties

@@ -4,6 +4,7 @@ author=Arduino
 maintainer=Arduino <[email protected]>
 sentence=Enables the communication with devices that use the Serial Peripheral Interface (SPI) Bus. For Arduino DUE only.
 paragraph=
+category=Communication
 url=http://www.arduino.cc/en/Reference/SPI
 architectures=sam
 

Diff for: libraries/Wire/library.properties

@@ -4,6 +4,7 @@ author=Arduino
 maintainer=Arduino <[email protected]>
 sentence=Allows the communication between devices or sensors connected via Two Wire Interface Bus. For Arduino DUE only.
 paragraph=
+cateogry=Communication
 url=http://www.arduino.cc/en/Reference/Wire
 architectures=sam