breaking change - need to add reference to integration views

[joeaudette]

In the work to implement support for bootstrap 4, we had to move the previous bootstrap 3 views from the cloudscribe.Core.SimpleContent.Web project (which is the integration between cloudscribe Core and cloudscribe SimpleContent) into a new project cloudscribe.Core.SimpleContent.Views.Bootstrap3

This impacts the Administration > Content Settings page which is the page that uses these views.

Those views used to be included automatically but after updating to the latest nuget packages, the views will be missing and need to be added manually by adding a nuget reference to cloudscribe.Core.SimpleContent.Views.Bootstrap3 and then adding to the Razor options in startup code to pull in the views from the embedded resources.

options.AddCloudscribeCoreSimpleContentIntegrationBootstrap3Views();