*.Interfaces packages renamed to *.Abstractions

[davidfowl]

If you run into any errors saying that a type exists in 2 places, and one is XX.Interfaces and the other is XX.Abstractions, chances are you have old and new packages in the same project.

[muratg]

Full list of changes:

• Microsoft.AspNet.Diagnostics.Interfaces -> Microsoft.AspNet.Diagnostics.Abstractions aspnet/Diagnostics#128
• Microsoft.AspNet.Hosting.Server.Interfaces -> Microsoft.AspNet.Hosting.Server.Abstractions aspnet/Hosting#250
• Microsoft.AspNet.Hosting.Interfaces -> Microsoft.AspNet.Hosting.Abstractions aspnet/Hosting#251
• Microsoft.AspNet.FileProviders.Interfaces -> Microsoft.AspNet.FileProviders.Abstractions aspnet/FileSystem#105
• Microsoft.Framework.Caching.Interfaces -> Microsoft.Framework.Caching.Abstractions aspnet/Caching#59
• Microsoft.AspNet.Http.Core renamed to Abstractions, Interfaces renamed to Features #11
• Microsoft.AspNet.DataProtection.Interfaces -> Microsoft.AspNet.DataProtection.Abstractions aspnet/DataProtection#81
• Microsoft.Framework.Logging.Interfaces -> Microsoft.Framework.Logging.Abstractions aspnet/Logging#177
• Microsoft.Framework.DependencyInjection.Interfaces -> Microsoft.Framework.DependencyInjection.Abstractions aspnet/DependencyInjection#225
• Microsoft.Framework.ConfigurationModel.Interfaces -> Microsoft.Framework.ConfigurationModel.Abstractions aspnet/Configuration#189
• Microsoft.Framework.Runtime.Roslyn.Interfaces -> Microsoft.Framework.Runtime.Roslyn.Abstractions aspnet/dnx#1741
• Microsoft.Framework.Runtime.Interfaces -> Microsoft.Framework.Runtime.Abstractions aspnet/dnx#1742
• Microsoft.Framework.DesignTimeHost.Interfaces -> Microsoft.Framework.DesignTimeHost.Abstractions aspnet/dnx#1743