Create README.md for a dataset-based layout storage example

README.md

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+# DevExpress VCL Reports - Store report layouts in a database
+
+This example stores a [report layout](https://docs.devexpress.com/VCL/dxReport.TdxReport.Layout) (XML-based template) in a BLOB field of a memory-based dataset ([TdxMemData](https://docs.devexpress.com/VCL/dxmdaset.TdxMemData) inherited from the standard [TDataSet](https://docwiki.embarcadero.com/Libraries/Athens/en/Data.DB.TDataSet) class shipped with the VCL library).
+
+
+## Testing the example
+
+* Run the sample app and click **New Report** to create an empty database record.
+* Click **Show Designer** to display the [Report Designer](https://docs.devexpress.com/XtraReports/119176/web-reporting/web-end-user-report-designer) dialog.
+* Create a report layout using any tools available in the UI.
+* Click the hamburger button, select the **Save** option, and close the dialog.
+* Close the app. The [TdxMemData](https://docs.devexpress.com/VCL/dxmdaset.TdxMemData) component will store layout data in a file between sessions.
+* Run the sample app again. Click **View Designer** to load the saved report layout, or **View Report** to preview a layout-based report in the [Report Viewer](https://docs.devexpress.com/XtraReports/401850/web-reporting/web-document-viewer) dialog.
+
+## Documentation
+
+* [TdxReport.Layout Property](https://docs.devexpress.com/VCL/dxReport.TdxReport.Layout)
+* [TdxReportDataSetJSONConnection Component](https://docs.devexpress.com/VCL/dxReport.ConnectionString.JSON.DB.TdxReportDataSetJSONConnection)
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+## Does this example address your development requirements/objectives?
+
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+
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