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.

#include "gen/llvm.h"
#include "ir/irmodule.h"

IrModule::IrModule(Module* module)
{
    M = module;
    dwarfCompileUnit = NULL;
}

IrModule::~IrModule()
{
}