Unskip tests

Fixes #1561 

closes #915
closes #1571

Binary serialization is not supported in CoreCLR and hence must be removed
from the subset which runs there.  This code is only used to support
CodeLens so rather than moving it around we are simply removing it
completely.  It will be relocated to CodeLens internally to continue supporting
their scenarios.

The Public API changes to DocumentId and ProjectId were necessary to
continue supporting serialization outside of the Roslyn code base.

closes #915

Fix link to issues labeled as "design notes" in readme

The original label was renamed, so the link didn't work anymore.

Only access VS services when required

Summary:

- Use Assembly.LoadFrom instead of Load
- Fix unit test issues
- Sort the usings

This moves the InMemoryAssemblyProvider out of CodeAnalysis.Desktop.
Because of its use in a high number of leaf project it is now included
as a linked file in those cases.

The loading of analyzer DLLS is now controlled by the compiler host.  It
is a behavior the host is forced to provide via the abstract member
CommonCompiler.AnalyzerLoadFunc.

These tests didn't need the complicated logic implemented by
InMemoryAssemblyProvider.  Replaced the logic with simple assembly
loading logic.  This lets us put the InMemoryAssemblyProvider type
cleanly in the Visual Studio layer.

This is a temporary change.  Keeping it internal forced me to add too
many InternalsVisibleTo declarations and ended up causing conflicts.
Making it public simplified the down stream effects of the change.

Eventually this type will be moved into the Visual Studio layer and
hence the public portion won't matter anymore.

added Async to async method

add some comment on esent key limit

Don't automatically include transitive references in the VisualStudioSetup vsix...

Code cleanup from PR 1434

These extra properties should cause only the build outputs of the directly referenced projects to be included in the vsix(es).

(fixes #578)

Detect changes in query lambda types and report rude edits appropriately

Fix tests CatchInAsyncStateMachine, CatchInIteratorStateMachine failing ...

Replaced WithSemicolon/Semicolon to be WithSemicolonToken/SemicolonToken...

Added obsolete hidden Semicolon/WithSemicolon APIs to ensure that the change is not breaking binary compatibility for now.

Some tests for generate variable and generate method incorrectly
asserted that instance members were generated from property
initializers. This was revealed by #1442.

Fixes #1561.

Fixed incorrect codegen when rethrow is used in a regular catch next to ...

Fixes tracking of lambdas and closures over multiple EnC generations

Catches without awaits should not be rewritten in a context of an await catch frame since rethrow in such catch is just a regular rethrow.
Fixes #1334

There are a couple of MEF-instantiated types that immediately obtain VS
services in their constructors. This can cause us to load and run code
from other assemblies that we may never actually use, and certainly
don't need right away.

Instead, we should just hold on to the `IServiceProvider` and use it to
obtain the VS service as-needed.

Replaced WithSemicolon/Semicolon to be WithSemicolonToken/SemicolonToken for consistency with other APIs

Fixes #1476

enable quick-info for interpolated strings