0.0210
    add method 'new_from_objective_hash'
    add method 'new_from_xml'
    add method 'set_attrs_from_objective_hash'
    add method 'set_attrs_from_xml'
0.0209
    new_and_validate is able to recive hash ref and validator.
0.0208
    Build.PL requires => { 'Simo::Error' => 0.0206 }
0.0207
    add method 'new_and_validate
0.0206
    add method 'validate'
0.0205
    1. add method load, loaded, build
    2. new return value change Simo::Wrapper object to that object
0.0203
    change name cycle_attrs -> filter_attrs
0.0203
    add Build.PL requires => Encode
0.0202
    bag fix new method pass args
0.0201
    Experimental version release
0.01_06
    Build.PL add required => 'Simo'

0.01_05
    refactoring encode_attrs
    refactoring decode_attrs

0.01_04
    delete cycle_attrs no_ret option 

0.01_03
    add cycle_attrs

0.01_03
    add clone method
    add freeze method
    add thaw method

0.01_02
    add encode_attrs method
    add decode_attrs method

0.01_01
    First developer release