Fix VarDecls for tuples. Closes #99. I've implemented it this way since it doesn't require any changes in the frontend. However, I think having TypeTuple expressed as LLVM struct types would make much more sense and open the door to tuple lvalues.

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;
}