v7.0.7

• Fix for issue #256: SendGrid v3 and HTML emails - Creates bad Json
• Updated dependency to SendGrid.Csharp.HTTP.Client to 2.0.6
• Updated dependency to JSON.NET to 9.0.1 in the Example and SendGrid projects
• Removed dependencies to SendGrid.CSharp.HTTP.Client and SendGrid.SmtpApi from the Example project as they are not needed for the example
• Update examples to pass in valid JSON
• Thanks to Gunnar Liljas for helping find the root cause quickly!