fix #510 - mixin template and alias

[ghost]

No description provided.

[ghost]

need more work in dsymbol, e.g for qualified symbols:

module runnable;

import std.stdio;


struct Foo
{
    template Deep()
    {
        int a;
    }
}

struct Bar
{
    mixin Foo.Deep d;
}

void main(string[] args)
{
    Bar bar;
    bar.d.
}   

does not work correctly for now (Deep is proposed, should be a instead)

[ghost]

It's when the Type is copied in DSymbol. Only first ident is handled.

[ghost]

It's good now