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.

module internal.contract;

extern(C):

void exit(int);

void _d_assert(bool cond, uint line, char[] msg)
{
    if (!cond) {
        printf("Aborted(%u): %.*s\n", line, msg.length, msg.ptr);
        exit(1);
    }
}