Merge pull request #88 from APopatanasov/testing

Updated X3 documentation
Updated Pivot documentation
Updated Pivot documentation images
Updated layouts
Update X2 controls
Added Partial Trust article for WPF and some small fixes
RadDiagram - articles checked and updated
Updated styles
Updated page.html
Add Freeze Panes article for SpreadProcessing
Add Freeze Panes article for SpreadProcessing
FreezePanes article for SpreadProcessing
update RadGridView
Merge pull request #89 from didiepetrova/testing

update RadGridView
Updated Styles
Update SpreadProcessing formats and conversion info
RadRibbonView - articles checked and updated;
Updated a Docking article
Merge pull request #1 from telerik/testing

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