WexBIM streamer bug on reading mapped instances resolved

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS13]$/xBIM/LatestSource;C36793
Removed refs to the old Nuget restore method (new method automagically works)
Removed ModelServer branch build status (as the branches have all been totally squashed and consolidated)

git-tfs-id: [https://tfs.codeplex.com:443/tfs/TFS13]$/xBIM/LatestSource;C36794