Use correct separator in keywords.txt

The Arduino IDE currently 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

Author: per1234

keywords.txt

@@ -77,8 +77,8 @@ setHandleSystemReset	KEYWORD2
 getTypeFromStatusByte	KEYWORD2
 getChannelFromStatusByte	KEYWORD2
 isChannelMessage	KEYWORD2
-encodeSysEx KEYWORD2
-decodeSysEx KEYWORD2
+encodeSysEx	KEYWORD2
+decodeSysEx	KEYWORD2
 
 
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