* Avoid usage of IOHelper in GlobalSettings
* Avoid usage of IOHelper in ModelsBuilderConfig.cs
* Avoid usage of IOHelper in ConnectionStrings.cs
* Simplified more config
* Fix for ModelsBuilderConfig
* Moved GetUmbracoMvcAreaNoCache to IOHelperExtensions
- Move the registration of configs into the factory
- Moved extension methods of ModelsMode into Umbraco.Core
- Removed references to Umbraco.Configuration from Umbraco.Infrastructure and Umbraco.ModelsBuilder.Embedded