Merge TopLevel and MethodBody speculative models

Fail tests on failed assert

Improved SyntaxFactory for documentation comments (Issue #218)

ensure the `Binaries` directory exists prior to building so the log files can be written

We had two trace listeners: one that conditionally threw and one which
always threw. Neither were used anywhere. This deletes the former and
updates the latter to not write out log entries to the console. Writing
to the Console isn't really portable or unit-test friendly.

AssertFailureException is something I want to make internal to the
TraceListener, so let's just simplify this code.

Allow publicsign true and delaysign false

Fix typo in makefile

Ensure unit tests close their text views

Adds a disposable wrapper around ITextView to avoid writing try ...
finally... everywhere.

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