improve pod
Rstats::Elements to class
na_postions to not pointer
int to I32
add Rstats::Values::Double
Rstats::Values::Double to not pointer
add std::vector typedef
change to std::map<I32, >I32
add get_type()
add na_position method
add get_size method
add get_xxx_values methods
values to private
improve doc
version up
cleanup API
add decompose_elements
cleanup c
add some compose_elements
add new_xxx(Rstats::Values::xxx)