Removed unused namespaces from ThreadAsyncOperation
Added ResXFileCodeGenerator to MonoDevelop Addins

Includes:

* ResXFileCodeGenerator to MonoDevelop.ResXFileCodeGenerator
* Removed Makefile.am
* Fixed coding style with auto-format
* Added standard copyright header
Reworked the namespace calculation
Move ThreadAsyncOperation to MonoDevelop.Ide.CustomTools
Merge ResXFileCodeGenerator into MonoDevelop.Ide

Not worth having such a small separate addin
Move GetNamespaceHint to CustomToolService.GetFileNamespace
[Ide] Set tool property on resx template
[Ide] CustomToolService.HandleRename should not be public
[Ide] Port ResXFileCodeGenerator to StronglyTypedResourceBuilder

This will generator more correct code on Windows, and will work
for langauges other than C#.
[Mac] BXC12869 - Mac menu updated too often