Add a VSB feature to export base64 strings.

The Text and Image Primitives of RadButton are not exposed in VSB

If you pick a font in the style builder that doesn't have a 'normal' setting (like a bold-only font) the VSB will crash.

Telerik Metro theme is not exported by VSB

To reproduce: 
1. Open ThemeViewer 
2. Choose theme Desert 
3. Check View RTL support
4. Check 'Aero mode on' of ribbonbar & backstageview, after that click on 'show form' button
5. Check 'Aero mode on' of RibbonBar & Office2007 App Men, after that click on 'show form' button and will see that ThemeViewer crash
When set theme Desert and change values of the properties of RibbonBar in the VisualStyleBuilder generate the same error.

Implementation of the new Visual Style Builder.

Add "Design View" and "Preview" tabs in the View menu of the Visual Style Builder. Currently you could hide them by clicking the scroll button and there is no easy way to restore them

FIX. VSB - error when trying to preview a theme in ThemeViewer and the current directory is different

It would be great to have an auto-save feature in Visual Style Builder for when/if VSB crashes or quits improperly and theme wasn't saved.  

See my forum post for more information, at: 
http://www.telerik.com/forums/visual-style-builder-frozen---does-it-do-any-auto-saving

Resolution: Under Tools>>Settings in VSB there is an option to enable/disable saving auto recovery info and the interval at which this info is saved. The auto recovery data is saved as a .tssp file in the C:\Users\<username>\AppData\Roaming\VsbRecoveryData\ folder. The mechanism is as follows every X minutes the file is overwritten with the current state of the theme in VSB. If VSB is closed gracefully or the theme is unloaded the auto recovery data is deleted. If VSB crashes the data in the auto recovery folder remains. On the next VSB start this folder is checked for content and if there is any the user is offered a choice to load this content.

To reproduce:
- Open the Office2007 theme in VSB
- Change the DrawFill and BackColor properties for the  CommandBarRowElement
- Save use in a custom application.

Workaround:
this.commandBarRowElement1.DrawFill = true;
this.commandBarRowElement1.BackColor = Color.Black;
this.commandBarRowElement1.GradientStyle = GradientStyles.Solid; 

Workaround: change the backcolors of the splitters at run-time

foreach (SplitterElement splitter in this.radSplitContainer1.Splitters)
{
    splitter.BackgroundFill.BackColor = Color.Red;
}

To reproduce:
Set the DescriptionFont of RadMenuItem in VSB (see attached image).

Workaround: 
 Remove the setting from the XML.