Add basic documentation

[dokterbob]

The actual code of this package looks very useful at first sight in comparison with tastypie and djangrestframework, as it seems to be more flexible than both and has a good middleway when it comes to coding practises.

However, it having no documentation whatsoever makes it an unacceptable choice in any development project. So please try to explain at least:

• What adrest is doing
• How it is doing it (ie. main concepts, resources, registration, mixins etc.)
• How this compares to existing API frameworks

And preferably: how to get started with builing an API. Also, knowing the level of automated testing used during development is good to, at least, evaluate it.

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[klen]

Thanks for the feedback. You are certainly right. But the module was developed for myself and I do not attach any importance to documentation. I'll do it as soon as I can.