[TextEditor] Set the background color of the scrolled window as a hint to
gtk+ to determine the brightness so it can use either dark or light overlay
scrollbars on Mac.  See bockbuild a5941db3f400834df90bf6c2f312da0a100aeecf

Fixes https://bugzilla.xamarin.com/show_bug.cgi?id=15257
[Core] Report Raygun errors from a background thread instead of the UI thread.
Fixed 'Bug 15388 - Create new console project, no completion +
deadlock when closing project'
Bump nrefactory.
Bump nrefactory.
Bump nrefactory.
Fixed 'Bug 15233 - Syntax highlighting incorrect in F#'.
Updated references to xwt, md-addins
[UnitTests] fixed failing unit test
[Core] This should be logging a critical error, not internal.
[Core] Log critical or fatal depending upon willShutdown.
Bump xwt to match md-addins l-s
Fixed 'Bug 15415 - Error when SAVING in mono develop'.
[CSharpBinding] Fixed potential System.InvalidOperationException
Fixed 'Bug 15387 - Broken completion for class inheritance at namespace level '
Try to fix 'Bug 15296 - MonoDevelop : `Navigate To` dialog eventually
freezes Monodevelop '.
Fixed 'Bug 15403 - Go to Definition does not work with user operators'
[Refactoring] Tweaked refactoring menu in case of user defined
operators.
Bump nrefactory.
[CSharpBinding] Ensure that the syntax tree always matches the
resolver root node inside the refactoring context.