Create a pre compilation module and apis to allow meta programming
to precompile razor pages.

This is limited to sites where the .cshtml are still deployed. It's
current purpose is to speed up startup. Deploying without the razor
files is a separate feature.
Adding Api Explorer
Don't close the stream when reading AssemblyMetadata
Convert memory streams to the byte[] before passing it to roslyn
[Fixes #926] Protocol & Host name ignored when creating action link
Removed primary ctor usage
Add razor parser errors to show up
Issue #985: Adding Functional Tests for ViewComponent Activators.
Commonizing Razor Host tests
Fix issue https://github.com/aspnet/Mvc/issues/1202
Updating MvcRazorHost to use overload that generates pragma checksum
Fixes #1152
Update razor precompilation diagnostics:

consistently add razor errors to diagnostics.

This will start producing proper errors with line numbers when Roslyn updates the default diagnostics formatter.
Remove usings
Updating ModelBinding tests to work in Mono
[Fixes #1183] Response uses chunked encoding when returning a string
Issue #1141 - When Accept header or Accept-Charset header has invalid QualityFactor we throw.
Fix: Imitating the same behavior as it is in WebApi. We ignore the entire header even if one part of it is invalid.
Addressing PR Comments.