Updated configs.
Fixed non-working slugs for some of the articles

There were wrong slugs (or slugs leading to unpublished pages) that was
fixed for the X2 controls.
In addition I made some fixes in the formatting of few articles
Incorrect slugs update
Exclude RadUpload from WPF
Merge branch 'testing' of https://github.com/telerik/xaml-docs into testing
Merge pull request #92 from didiepetrova/testing

Fix links for WPF/SL only X1
Merge pull request #2 from telerik/testing

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