Logging option for the post-receive hook

[B2F]

It would be nice to have an easy way to log git-ftp.py output to a file when the script is called from a bare repository with the post-receive hook... Not only to debug possible errors, but also to record an history of the files uploaded and removed from the ftp server.

Would that be hard to implement ? How to ? Maybe we could add a configuration setting to it.