Fixed issue with internal real representation, incorrect for non x86-32 architectures. Cleaned up CallExp::toElem, moved implementation to tocall.cpp providing a single procedure to call arbitrary D functions fairly easily.

import tango.io.Console;
void main()
{
    Cout("getting name std").newline;
    Cerr("getting name err").newline;
    auto s = Cin.get();
    Cout("putting name").newline;
    Cout (s).newline;
}