0.0215
    update this document.
0.0214
    add 'connect' method
    update this document.
0.0213
    rename method contain 'attrs'.
0.0212
    referctoring 'new' and 'build' method.
    remove 'load' and 'loaded' becuase these methods is no more needed.
0.0211
    bag fix 'set_attrs_from_objective_hash'.
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