[svn r188] Fixed using a dereferenced pointer argument as both l- and r-value. fixes tango.io.FileRoots. Reorganized the tangotests dir a bit.

module foreach4;

void main()
{
    int[] arr = new int[4];
    foreach(i,v;arr) {
        printf("arr[%u] = %d\n",i,v);
    }
}