Add a new monster

![screenshot](https://f.cloud.github.com/assets/277729/1649193/9e656c5c-59ea-11e3-8a24-083d8a4e7d47.png)

I added a new monster (see the screenshot).
I changed the demon-kana-source.txt and the perl script.
you can find the new monster in the mushroom quest.

I am not an expert in python. This is my first pull-request on github. 

Thanks.