use nodeProperties class instead of its pointer as the bundled vertex property to eliminate the need for dynamtically allocate memory and manually garbage collection.#128
remove the customized clone member functions of nodeProperties class since it is copiable as well as the entire tree object.#128
make it backward compatible for loading old archive. #128
Merge branch 'trunk' into treeCopyable
fix the bug for log transform parsing due to the inappropriate call to the base default constructor and inappropriate acesss to the base memember. now use initialization list to call parametric base constructor to set base member 'type'
add hdf API to test code
bundle boost regex library and close #130
Merge branch 'trunk' into treeCopyable
close #131