service hub component is basically thin layer that deals with converting data to pass in to RemoteWorkspace

RemoteWorkspace has host agnostic implementation of roslyn features/services/workspace that will run in remote host

only real change is having ICompilerDiagnosticAnalyzer interface which can either have inproc implementation or out of proc implementation.

inproc is needed since diagnostics are in feature layer and one who uses feature layer out side of VS host need an implementation.

this gives an ability for host (vs) to talk to remote host (service hub)

simplified temporary storage service's temporary storage management and added ability to attach to existing temporary storage

added MustRunInProc in IBuiltInAnalyzer and some clean up around serializing Solution/Project/DocumentId and how DocumentState is exposed.

The corresponding VSIX package had the same `<ShortcutPath>` as
Microsoft.CodeAnalysis.EditorFeatures.vsix which caused some problems
during setup ngen because symlinks were replaced.  The .Next.dll only
contains two assembly binding redirect attributes and doesn't need to be
ngen'ed.

The display names are shown if you add the feed URL, so being able to
distinguish between them is nice.

(Note: I also saw that we had a duplicate ID, so I changed the one we don't
seem to publish anymore)