Ability to upload files to Azure Blob Storage

CustomUploadHandler-AzureUpload demo is added in our SDK:
https://github.com/telerik/xaml-sdk/tree/master/Upload/CustomUploadHandler-AzureUpload 

Expose an event to fire if the files that should be uploaded are in use by another process.

Implement a feature that allows the RadUpload control to resume its upload session when interrupted by a connection failure.

Add support for different upload services - WCF, etc. Ability to use the RadUpload with a Linux server side.

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The reason is security and asynchronous implementation + remove the processing to a service instead of the silverlight app.

security: Using the filestream attribute in SQL Server 2008 the connection to the database is to be made by windows authentication. Therefor we created a functional windows account that runs the service and is responsible for the connection to the database server.
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Update documentation articles and add new ones.

Currently there is no way to pass parameters in the FileUploadFailedEventArgs of the FileUploadFailed event. In the UploadCompleted event such parameters are passed in the HandlerData.CustomData of the FileUploadedEventArgs.

Available in LIB version: 2014.3.1402

Provide built-in compression.

Implement Resume/AutoResume on upload error.

Change the logic that creates a default unique name for duplicate files. At the moment it is based on a counter and instead we need to consider renaming the file as a "Copy of [fileName]" or "[fileName] - Copy".

I think it would be great if we could have feature parity on this in WPF as uploading file is a rather common requirement in line of business applications. I'm working on migrating our product referential data management application to WPF from asp.net / javascript and i find myself having to roll my own upload for the time being.

Dismissing all files doesn't change the title's status. However, if the "Cancel" button is used the title's status is updated correctly.

The RadUpload shoul handle this sceanrio without the help of the Dispatcher

The UploadFinished event is not fired when file's size is bigger than the Upload.BufferSize and the Upload failed.

Set a Filter in the RadUpload. Click Browse Button. You cannot see the filtered files but you can select it in the combo with typing their names.

Incorrect UI state when validating all files with the Validate event.
FIXED: If at least one file is valid the RadUpload behaves correctly.
TO BE FIXED: If all files are invalid the upload is in uploading state and should be in SelectFiles state ("Add more files" should be shown).

Allow end user to choose if the file should be overwritten

Allow dragging messages from Outlook to the RadUploadDropPanel

We have RadUpload which has MaxFileSize limited to 10MB. If I only try to upload document everything works OK and the document is not uploaded. However, if I select the file which is open in editor, then close the editor and press upload, file is uploaded, even if size is bigger than 10MB

Steps to reproduce bug:
1. Open a file, which is bigger than max allowed size in editor (i.e. on MSWord)
2. Select the file in RadUpload - an exception is thrown to indicate the file is used by another process 
3. Close the editor
4. Press upload - the file is uploaded even though its size is bigger than the allows file size

If the user dismisses an item while the upload process is paused, the resume button is hidden and replaced by an Upload button. This way the upload process can be restarted but not resumed. But if there is only one item and it gets dismissed during paused upload operation - the resume button is still there.