moved level colours into layouts where they belong, updated README

lib/layouts.js

@@ -2,16 +2,27 @@ var dateFormat = require('./date_format')
 , util = require('util')
 , replacementRegExp = /%[sdj]/g
 , layoutMakers = {
-    "messagePassThrough": function() { return messagePassThroughLayout; },
-    "basic": function() { return basicLayout; },
-    "colored": function() { return colouredLayout; },
-    "coloured": function() { return colouredLayout; },
-    "pattern": function (config) {
+    "messagePassThrough": function() { return messagePassThroughLayout; }
+  , "basic": function() { return basicLayout; }
+  , "colored": function() { return colouredLayout; }
+  , "coloured": function() { return colouredLayout; }
+  , "pattern": function (config) {
 	var pattern = config.pattern || undefined;
 	return patternLayout(pattern);
     }
+}
+, colours = {
+    ALL: "grey"
+  , TRACE: "blue"
+  , DEBUG: "cyan"
+  , INFO: "green"
+  , WARN: "yellow"
+  , ERROR: "red"
+  , FATAL: "magenta"
+  , OFF: "grey"
 };
 
+
 function formatLogData(logData) {
     var output = ""
     , data = Array.isArray(logData) ? logData.slice() : Array.prototype.slice.call(arguments)
@@ -100,7 +111,7 @@ function basicLayout (loggingEvent) {
  * same as basicLayout, but with colours.
  */
 function colouredLayout (loggingEvent) {
-    return timestampLevelAndCategory(loggingEvent, loggingEvent.level.colour) + formatLogData(loggingEvent.data);
+    return timestampLevelAndCategory(loggingEvent, colours[loggingEvent.level.toString()]) + formatLogData(loggingEvent.data);
 }
 
 function messagePassThroughLayout (loggingEvent) {