Topic: Documentation updates

Hi everyone,

I've posted a couple of updates to the documentation so less and less "TODO"s are remaining. The new sections of the docs include figures to explain the user interface, some conceptual explanations of data quality and some DataCleaner configuration examples.

Any feedback on the docs would be greatly appreciated. And as always - if you're interested in contributing to the product (including the documentation) expect only to be welcomed and rewarded with gratitude!