Kill as soon as possible the special case handling of tuples in foreach

[Vlad Levenfeld via Digitalmars-d]

I loved this feature when I first found out about it but after 
reading your arguments against on the bug tracker I have to agree 
with your position. It would be much nicer if it worked with 
uniform tuple syntax like

   foreach (i, {x,y}; [tuple('a',`b`),tuple('c',`d`)])

where i is size_t and x,y is char, string

which is I think what you were proposing.