dmd 1.060 and 2.045 release

[Walter Bright]

Steven Schveighoffer wrote:
> It may not be an issue, the spell checker is simply a nice hint, but 
> isn't essential to determine errors.

It's a good summary of the situation. I've felt that as long as the message took 
under a second to generate, it was ok. Realistically, I don't see anyone using 
identifiers as long as you tested unless they were machine generated.

In my own code, I've found the spell checker is more than a nice hint. Most of 
the time it nails it and speeds fixing the problem because I don't need to 
myself go and manually look up the correct spelling.

Iterating through the symbol table is not impossible, it's just a lot of work as 
it is not designed for that. There are also some issues with shadowing. 
Furthermore, I'd like the speller to work with the symbol table in the C++ 
compiler, too, which I don't wish to reimplement.