Describe lambda appender in README

Author: Bryan

README.md

@@ -2,4 +2,21 @@
 
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+Assorted _appenders_ to be used with [log4js](https://github.com/log4js-node/log4js-node).
+
+### Console Appender (for AWS Lambda)
+
+A console appender that routes output to the correct ```console``` function, according to log level. This appender is useful for logging within an AWS Lambda function.
+
+* TRACE -> ```console.trace```
+* DEBUG -> ```console.debug```
+* INFO -> ```console.log```
+* WARN -> ```console.warn```
+* ERROR -> ```console.error```
+* FATAL -> ```console.error```
+
+**Example**
+
+
+