v3-upload

[quirijnslings]

Please merge v3-platform first

New features:

• Update OriginalFilename
• Pass custom parameters to the upload endpoint
• Specify the following asset properties when uploading a file:
• The following properties can now be passed along directly when uploading a file:
  • Description
  • Name
  • OriginalFilename
  • Copyright
  • IsPublic
  • PublishedDate
  • MetapropertyOptions
  • PublishedDate
• Upload file as stream

Test interactively with UploadSample. Unit testing an upload is not possible (or very hard to do).

[quirijnslings]

Fixed merge conflicts

[quirijnslings]

Closing this PR, the changes have been merged into feature/find-assets already.