Add highlighting for Igor Pro procedures

Available in pygments since 5ceb7533e214.

Signed-off-by: Thomas Braun <thomas.braun@byte-physics.de>

samples/IGOR Pro/functions.ipf

@@ -0,0 +1,38 @@
+#pragma rtGlobals=3
+
+Function FooBar()
+	return 0
+End
+
+Function FooBarSubType() : ButtonControl
+	return 0
+End
+
+Function/D FooBarVar()
+	return 0
+End
+
+static Function FooBarStatic()
+	return 0
+End
+
+threadsafe static Function FooBarStaticThreadsafe()
+	return 0
+End
+
+threadsafe Function FooBarThread()
+	return 0
+End
+
+Function CallOperationsAndBuiltInFuncs(string var)
+
+	string someDQString = "abcd"
+
+	Make/N=(1,2,3,4) myWave
+	Redimension/N=(-1,-1,-1,5) myWave
+
+	print strlen(someDQString)
+
+	return 0
+End
+