Introduce ObjectDisplayOptions.EscapeNonPrintableStringCharacters

Make captured "this" a constant in expression trees.

Add crossgen script and crossgen xplat Roslyn toolsets

Remove locale-dependence in RealParserTests

It used to be always on in C# and implied by UseQuotes in VB.  Now it can
be manipulated separately.  This will allow us to print unescaped strings
in the C# interactive window.

MetadataVisualizer: Display Kind column of CDI table

Construct submissions with empty file path in VS

Update toolset to 20160108-01

Fix #3290

Only allow one client to produce a symbol tree info at a time.

This addresses part of #7883

Adjust Better Betterness rules around method group conversions in order to restore backward compatibility

Use nameof expression for exceptions in Compilers projects

When computing completion after a dot, consider a symbol's converted type
if it's an array type.

Use Array.Empty when calling into well known helpers that do not care.

Typical example is Linq.Expressions APIs which do not persist arrays (since they are mutable) and therefore do not care at all if empty arrays are reused or reallocated.
Passing empty arrays to such APIs is fairly common case and using Array.Empty if available would reduce allocations.

Fixes #6759

Improve location used for CS0316

fix existing pr filtering

update auto-merge tool to support multiple repositories and options