I love pull requests, and I need all the help I can get. However, there are a few rules to follow if you want a better chance of having your pull request merged:
npm test. This is very important - without tests, your feature may be broken by subsequent changes and I may never know. Plus it's always nice to know that your changes work :-)
People who have helped so far - these are just the people whose commits I've accepted. There are lots of people who've helped by submitting bug reports or pull requests that I haven't merged, but I have used their ideas to implement a different way. Thanks to you all. This library also owes a huge amount to the original log4js project.