New Esperanto Translation by Mathieu Stumpf Guntz

[Ming]

Mathieu Stumpf Guntz graciously provided an Esperanto translation for Babylscript. I have updated the website with this new translation (except for the applet and SWT versions of Babylscript, which I don't think anyone uses).

I have also merged in an initial, partial Polish translation. I've been sitting on it for a few years, but I wasn't sure what to do with it since it was incomplete and unedited.