[boost] another approach to memory management that solves the referential cycles problem

Dear boost members, I have placed in the boost Vault, under the section "memory", the file 'mm.zip' which contains: 1) a file "readme.txt" with a little documentation. 2) a file 'main.cpp' which contains a reference implementation and test. This (I wouldn't not call it new, but certainly interesting) approach to memory management solves the problem of cycles and it can also provide a sort of garbage collection, without the issues of other approaches (explained in the readme). Suggestions, comments, ideas, etc are welcomed.