Language file support for DWT

[Frank Benoit]

Frank Benoit schrieb:
> For the SWT part of DWT, I added the language files and support for
> accessing them in dependency of the current locale. (HG repositories)
> 
> Test program:
> 
> import dwt.std;
> void main() {
> 	Shell shell = new Shell(Display.getDefault());
> 	MessageBox.showMessageBox(
> 		"Dummy text",
> 		"Title",
> 		shell,
> 		DWT.ABORT|DWT.RETRY|DWT.IGNORE|DWT.ICON_QUESTION );
> 	Display.getDefault().dispose();
> 	return 0;
> }
> 
> To compile, please notice that now a new compiler switch (-J) is needed
> for the new resource directories in dwt-win/res or dwt-linux/res
> 
> Please test if it works for you in your language.

On Windows, the language files are only used for Link, CCombo,
CTabFolder. So this example is only useful for Linux users.

I added the dwt-samples/user/RetryMessageBox.d
This also shows on Windows a sample text that should show up in your
language.