[Grace-core] Object Constructors

[James Noble]

> By popular request, I wrote up a wiki page on Object constructors,  
> with explanatory text.
>
> https://projects.cecs.pdx.edu/~black/NewOOL/index.cgi/wiki/ 
> ObjectConstructors

looks good!.  I tweaked the syntax a bit (cos I thought the layout was  
wrong somewhere)
and and put explicitly typed versions later.

> Perhaps with some work, this could become a blog post.

yep I think so  - assuming we go down this path.

the whole issue with default values and lambdas is something we need  
to talk about...

J