Use correct separator in keywords.txt

The Arduino IDE requires the use of a tab separator between the name and identifier. Without this tab the keyword is not highlighted.

Reference: https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5:-Library-specification#keywords

keywords.txt

@@ -6,61 +6,61 @@
 # Datatypes (KEYWORD1)
 #######################################
 
-NVRAM       KEYWORD1
-EEPROM      KEYWORD1
-VirtualPage KEYWORD1
-Flash       KEYWORD1
+NVRAM	      KEYWORD1
+EEPROM	    KEYWORD1
+VirtualPage	KEYWORD1
+Flash	      KEYWORD1
 
 #######################################
 # Methods and Functions (KEYWORD2)
 #######################################
 
 # Flash/VirtualPage/EEPROM
-length	   KEYWORD2
-page_count KEYWORD2
+length	    KEYWORD2
+page_count	KEYWORD2
 
 # Flash/NVRAM/EEPROM
-write       KEYWORD2
-write_block KEYWORD2
-clean_up    KEYWORD2
+write	      KEYWORD2
+write_block	KEYWORD2
+clean_up	  KEYWORD2
 
 # Flash
-size	                 KEYWORD2
-page_size              KEYWORD2
-page_size_bits         KEYWORD2
-page_count             KEYWORD2
-specified_erase_cycles KEYWORD2
-page_address	         KEYWORD2
-erase		               KEYWORD2
-erase_all	             KEYWORD2
+size	                  KEYWORD2
+page_size	              KEYWORD2
+page_size_bits	        KEYWORD2
+page_count	            KEYWORD2
+specified_erase_cycles	KEYWORD2
+page_address	          KEYWORD2
+erase		                KEYWORD2
+erase_all	              KEYWORD2
 
 # VirtualPage
-wear_level      KEYWORD2
-get             KEYWORD2
-allocate        KEYWORD2
-release_prepare KEYWORD2
-release         KEYWORD2
-release_started KEYWORD2
-fail            KEYWORD2
-format          KEYWORD2
+wear_level	    KEYWORD2
+get	            KEYWORD2
+allocate	      KEYWORD2
+release_prepare	KEYWORD2
+release	        KEYWORD2
+release_started	KEYWORD2
+fail	          KEYWORD2
+format	        KEYWORD2
 
 # NVRAM
-read_block    KEYWORD2
-read          KEYWORD2
-write_prepare KEYWORD2
+read_block	  KEYWORD2
+read	        KEYWORD2
+write_prepare	KEYWORD2
 
 # EEPROM
-read   KEYWORD2
-update KEYWORD2
+read	  KEYWORD2
+update	KEYWORD2
 
 #######################################
 # Constants (LITERAL1)
 #######################################
 
 # Flash.h
-FLASH_ERASE_CYCLES          LITERAL1
-FLASH_PAGE_SIZE             LITERAL1
-FLASH_ERASE_PAGE_TIME       LITERAL1
-FLASH_SUPPORTS_RANDOM_WRITE LITERAL1
-FLASH_WRITES_PER_WORD       LITERAL1
-FLASH_WRITES_PER_PAGE       LITERAL1
+FLASH_ERASE_CYCLES	        LITERAL1
+FLASH_PAGE_SIZE	            LITERAL1
+FLASH_ERASE_PAGE_TIME	      LITERAL1
+FLASH_SUPPORTS_RANDOM_WRITE	LITERAL1
+FLASH_WRITES_PER_WORD	      LITERAL1
+FLASH_WRITES_PER_PAGE	      LITERAL1