Roundcube developper's guide/documentation?

[ash]

Hi all,

I've recently deployed Roundcube as a webmail solution. I'm very happy with it since it possesses the main functionnalities I am looking for, with an attractive user interface.

Since I also happen to be a PHP developper, I would like to know if there exists a documentation for Roundcube - a sort of developper's guide to the code. I would like to implement a couple of more features and I've tried to look into the source code, but I'm finding it difficult to read.

Ash