extend foreach to work on non-arrays

[IntegratedDimensions]

Doesn't make any sense?

foreach(a; x)

if x is not an array then a = x and the loop reduces simply and 
function to the case it is not so their can be no harm.

It unifies the concepts so that one does not have to worry if x 
is an array or not and can offer no harm since when x is not an 
array everything simply reduces to an an alias of x.