0.1109
    modify error message
    add 'setter_return_value' option
    return value defaut is curretn value
0.1108
    bag fix : Attr attribute is not registerd when accessor method is called at frist.
0.1107
    private auto_build method can be used. _method coresponde _build_method
0.1106
    bag fix. ATTRS return attr list which is not dupulicate.
0.1105
    auto_build option can set subroutine reference
0.1104
    add method 'accessor', this is alias of 'ac'
0.1103
    import Simo::Util method
0.1102
    bag fix ATTRS method.
0.1101
    can specify attribute 'Attr'. you can get attribute list to use ATTRS method.
0.1008 
    bag fix auto_build option 
0.1007
    update Simo::Manual::Japanese
0.1006
    change new error messese
0.1005
    update documnet
0.1004
    update japanese document
0.1003
    update japanese document
0.1002
    add accessor option 'auto_build'
0.1001
    experimental version release
    add import option 'new'
0.09_05
    add method. 'new_self_and_accessor'
0.09_04
    add method. 'and_super'
0.09_03
    1. read_only throw Simo::Error
    2. document update
0.09_02
    1. update Document
    2. use 5.008_001
0.09_01
    1. use Simo::Error;
    
0.0806
    Build.PL requires => { 'Pod::Simple' => 3.07 }
Version 0.0805
    1. add Build.PL build_requires Test::Pod => 1.26

Version 0.0804
    1. add Build.PL requires => Storable
    2. add =encoding utf-8 to Simo::Manual::Japanese

Version 0.0803
    1. bag fix default is deep copy.

Version 0.0802
    1. Document is updated.
    2. get_attrs, get_attrs_as_hash, set_attrs, run_methods is not recommended.

Version 0.0801
    Version 0.08 first release

Version 0.07_05
    1. add REQUIRED_ATTRS method. 

Version 0.07_04
    1. mixin inherit order move last.

Version 0.07_03
    1. fix constrain error message bag.

Version 0.07_02
    1. constrain error message is easy to understand.
    
Version 0.07_01
    1. add import opiton 'base' and 'mixin'.
    2. add run_methods method.
    
Version 0.0601
    1. new version release.

Version 0.05_08
    1. add method. get_attrs, get_attrs_as_hash, set_attrs

Version 0.05_07
    1. craok read_only acseccor when value is set. 

Version 0.05_06
    1. refactoring. package variable $ac_opt change rexical variable.

Version 0.05_05
    1. read_only method should be 'get_'. If not, warnings is happen.

Version 0.05_04
    1. add read_only option

Version 0.05_03
    1. refactoring. constrain, filter, trigger accessor.

Version 0.05_02
    1. refactoring. ac funciton is simplified.

Version 0.05_01
    1. I write accessor by using meta programing.

Version 0.04_02
    1. warn in case constrain, filter, trigger options order is invalid

Version 0.04_01 
    1. document is writed at new version.

Version 0.03_06
    1. fix bag undef value cannot be set.

Version 0.03_05
    1. document update
    2. new method illegal key setting error message change

Version 0.03_04
    1. confess convert to croak because confess is bad looking.

Version 0.03_03
    the following
    1. auto confess for constrain option
    2. constrain, filter, and trigger option confess unless it isn't code ref
    
Version 0.03_02
    referctering
        DESTROY method is deleted.
       _SIMO_ac_opt method is deleted.

Version 0.03_01
    developer version
    add new method
       1. constrain
       2. fillter
       3. trigger
       
Version 0.0206
    referctaring Simo::ac_opt Simo::ac_define_class
    and default value logic 

Version 0.0205
    I'm sorry. accessor listcontext is Disable. only scalar context.

Version 0.0204
    Version of Document is collected.

Version 0.0203
    I change Makefile.PL so that you can install without make.
    
Version 0.0202
    I change module builder to Module::Build so that you can install without make.

Version 0.0201
    I don't pack test file in package. so I pack test file in package.

Version 0.02
    new method can receive hash ref.

Version 0.01_05
    Remove hook accessor option.
    Add set_hook accessor option and get_hook accessor option.
    
    Fix sub _SIMO_ac_opt
    $Simo::info{ class }{ $class }{ ac }{ opt } = $opt;
    to
    $Simo::info{ class }{ $class }{ ac }{ $key }{ opt } = $opt;
    
Version 0.01_04
    fix to be right inherit order 
    
    unshift @{ "${caller_class}::ISA" }, __PACKAGE__;
    to
    push @{ "${caller_class}::ISA" }, __PACKAGE__;

Version 0.01_03
    refactoring
    
    qq/sub ${ac_define_class}::${key}/ . qw/{ _SIMO_ac_real( '$key' , \@_ ) }/;
    to
    qq/sub ${ac_define_class}::${key} { _SIMO_ac_real( '$key' , \@_ ) }/;

Version 0.01_02
    fix this failed test.
    FAIL Simo-0.01 i386-netbsd-thread-multi-64int 4.0

Version 0.01_01
    first developer release