Add libraries categories

libraries/EEPROM/library.properties

@@ -4,5 +4,6 @@ author=Ivan Grokhotkov
 maintainer=Ivan Grokhotkov <ivan@esp8266.com>
 sentence=Enables reading and writing data to the permanent FLASH storage, up to 4kb.
 paragraph=
+category=Data Storage
 url=http://arduino.cc/en/Reference/EEPROM
 architectures=esp8266

libraries/ESP8266httpUpdate/library.properties

@@ -4,5 +4,6 @@ author=Markus Sattler
 maintainer=Markus Sattler
 sentence=Http Update for ESP8266
 paragraph=
+category=Data Processing
 url=https://github.com/Links2004/Arduino/tree/esp8266/hardware/esp8266com/esp8266/libraries/ESP8266httpUpdate
 architectures=esp8266

libraries/Hash/library.properties

@@ -4,5 +4,6 @@ author=Markus Sattler
 maintainer=Markus Sattler 
 sentence=Generate Hash from data
 paragraph=
+category=Data Processing
 url=
 architectures=esp8266

libraries/SPI/library.properties

@@ -4,5 +4,6 @@ author=Arduino
 maintainer=Arduino <info@arduino.cc>
 sentence=Enables the communication with devices that use the Serial Peripheral Interface (SPI) Bus. For all Arduino boards, BUT Arduino DUE. 
 paragraph=
+category=Signal Input/Output
 url=http://arduino.cc/en/Reference/SPI
 architectures=esp8266

libraries/Ticker/library.properties

@@ -4,5 +4,6 @@ author=Ivan Grokhtokov <ivan@esp8266.com>
 maintainer=Ivan Grokhtokov <ivan@esp8266.com>
 sentence=Allows to call functions with a given interval.
 paragraph=
+category=Timing
 url=
 architectures=esp8266

libraries/Wire/library.properties

@@ -4,5 +4,6 @@ author=Arduino
 maintainer=Ivan Grokhotkov <ivan@esp8266.com>
 sentence=Allows the communication between devices or sensors connected via Two Wire Interface Bus. For esp8266 boards. 
 paragraph=
+category=Signal Input/Output
 url=http://arduino.cc/en/Reference/Wire
 architectures=esp8266