Updated runtime files.
diff --git a/runtime/syntax/arduino.vim b/runtime/syntax/arduino.vim
new file mode 100644
index 0000000..14299a4
--- /dev/null
+++ b/runtime/syntax/arduino.vim
@@ -0,0 +1,61 @@
+" Vim syntax file
+" Language: Arduino
+" Maintainer: Johannes Hoff <johannes@johanneshoff.com>
+" Last Change: 2011 June 3
+" License: VIM license (:help license, replace vim by arduino.vim)
+
+" Syntax highlighting like in the Arduino IDE
+" Keywords extracted from <arduino>/build/shared/lib/keywords.txt (arduino
+" version 0021)
+
+" Thanks to Rik, Erik Nomitch, Adam Obeng and Graeme Cross for helpful feedback!
+
+" For version 5.x: Clear all syntax items
+" For version 6.x: Quit when a syntax file was already loaded
+if version < 600
+ syntax clear
+elseif exists("b:current_syntax")
+ finish
+endif
+
+" Read the C syntax to start with
+if version < 600
+ so <sfile>:p:h/cpp.vim
+else
+ runtime! syntax/cpp.vim
+endif
+
+syn keyword arduinoConstant HIGH LOW INPUT OUTPUT
+syn keyword arduinoConstant DEC BIN HEX OCT BYTE
+syn keyword arduinoConstant PI HALF_PI TWO_PI
+syn keyword arduinoConstant LSBFIRST MSBFIRST
+syn keyword arduinoConstant CHANGE FALLING RISING
+syn keyword arduinoConstant SERIAL DISPLAY
+syn keyword arduinoConstant DEFAULT EXTERNAL INTERNAL INTERNAL1V1 INTERNAL2V56
+
+syn keyword arduinoStdFunc abs acos asin atan atan2 ceil constrain
+syn keyword arduinoStdFunc cos degrees exp floor log
+syn keyword arduinoStdFunc map max min pow radians
+syn keyword arduinoStdFunc round sin sq sqrt tan
+syn keyword arduinoStdFunc randomSeed random
+
+syn keyword arduinoFunc analogReference analogRead analogWrite
+syn keyword arduinoFunc attachInterrupt detachInterrupt interrupts noInterrupts
+syn keyword arduinoFunc lowByte highByte bitRead bitWrite bitSet bitClear
+syn keyword arduinoFunc millis micros delay delayMicroseconds
+syn keyword arduinoFunc pinMode digitalWrite digitalRead
+syn keyword arduinoFunc tone noTone pulseIn shiftOut
+
+syn keyword arduinoMethod setup loop
+syn keyword arduinoMethod begin end available read flush print println write peek
+
+syn keyword arduinoType boolean byte word String
+
+syn keyword arduinoModule Serial Serial1 Serial2 Serial3
+
+hi def link arduinoType Type
+hi def link arduinoConstant Constant
+hi def link arduinoStdFunc Function
+hi def link arduinoFunc Function
+hi def link arduinoMethod Function
+hi def link arduinoModule Identifier