Use correct field separator in keywords.txt

The Arduino IDE requires the use of a single true tab separator between the keyword name and identifier. When spaces are used rather than a true tab, the keyword is not highlighted.

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

Author: per1234

keywords.txt

@@ -409,15 +409,15 @@ resume	KEYWORD2
 enableIROut	KEYWORD2
 sendNEC	KEYWORD2
 sendSony	KEYWORD2
-sendSanyo KEYWORD2
-sendMitsubishi KEYWORD2
+sendSanyo	KEYWORD2
+sendMitsubishi	KEYWORD2
 sendRaw	KEYWORD2
 sendRC5	KEYWORD2
 sendRC6	KEYWORD2
-sendDISH KEYWORD2
-sendSharp KEYWORD2
-sendPanasonic KEYWORD2
-sendJVC KEYWORD2
+sendDISH	KEYWORD2
+sendSharp	KEYWORD2
+sendPanasonic	KEYWORD2
+sendJVC	KEYWORD2
 Timing	KEYWORD2
 Ranging	KEYWORD2
 
@@ -444,15 +444,15 @@ begin	KEYWORD2
 
 NEC	LITERAL1
 SONY	LITERAL1
-SANYO LITERAL1
-MITSUBISHI LITERAL1
+SANYO	LITERAL1
+MITSUBISHI	LITERAL1
 RC5	LITERAL1
 RC6	LITERAL1
-DISH LITERAL1
-SHARP LITERAL1
-PANASONIC LITERAL1
-JVC LITERAL1
+DISH	LITERAL1
+SHARP	LITERAL1
+PANASONIC	LITERAL1
+JVC	LITERAL1
 UNKNOWN	LITERAL1
 REPEAT	LITERAL1
 CM	LITERAL1	Constants
-INC	LITERAL1	Constants
+INC	LITERAL1	Constants