Changed weaver to make a copy and give the generated file the original name.
Added nuget package creation project.
Fixed line endings.
* AllureAttachmentAttribute.cs: Added MimeType and Title to
  attachment attribute.

* AttachmentAddedEventArgs.cs: Added MimeType and Title to event args.

* Attachments.cs: Add method renamed to OnAdded and added boolean
  return value to indicate if the even was raised or not.