Adding all unsolved issues from http://sourceforge.net/apps/mantisbt/stxxl/ to TODO.
Adding all unsolved issues from http://sourceforge.net/apps/mantisbt/stxxl/ to TODO.

sriram-mahavadi/extlp,sriram-mahavadi/extlp,sriram-mahavadi/extlp,sriram-mahavadi/extlp