At least 50% of the visitors to this web site do not speak English as a first language. I have placed a Google Translation box on the left. Hopefully this will help make it easier to understand.
However, I realize that the translations it gives aren't very good - especially when it tries to translate source code. Don't misunderstand me - the Google software is quite impressive, but this is the type of text where a native speaker (who is also a programmer) is needed for a good translation.
If you would like to provide translations of any of the documentation content, I will post it here. The most important parts are the first two tutorials.