Add ImportC compiler to dmd

[zjh]

The advantage of the forum is that it is lively and can discuss 
issues.

But the disadvantage of this forum is that it does not collect 
some useful information in a separate subsection.

So, I would suggest to the D people,

You should answer the user's questions and put a separate 
subsection.

Especially D novices, they need to understand the future of D, 
the future, the current situation of D.

Don't be afraid of late, don't be afraid of criticism, don't be 
afraid of making mistakes.

Fear is that the novice can not find a solution to their 
confusion.

Without the participation of novices, is water without a source, 
again.
So c++, is very concerned about novice friendly
we,should learn from it.