Updating dev Nuget.config
#10 - Rename Middleware package to Server.
Server: Expose WebSocketOptions. Make feature replacement configurable.
Updated packages due to changes in security contracts
Rename IHttpOpaqueUpgradeFeature to IHttpUpgradeFeature.
Renamed configurations to frameworks in project.json
Reacting to System.Security.Cryptograph.Encryption package rename
Updating release Nuget.config