add exception in allcaps for PIL module

Author: Matt Morrison

PythonImproved.tmLanguage

@@ -108,8 +108,10 @@
 			<string>comment.line.number-sign.python</string>
 		</dict>
 		<dict>
+			<key>comment</key>
+			<string>Match identifiers in ALL_CAPS as constants. Built-in exception for PIL module.</string>
 			<key>match</key>
-			<string>\b([A-Z_][A-Z0-9_]*)\b(?!\()</string>
+			<string>\b(?!\bPIL\b)([A-Z_][A-Z0-9_]*)\b(?!\()</string>
 			<key>name</key>
 			<string>constant.other.allcaps.python</string>
 		</dict>