Delete all code within Version5UuidSetter class
(red) Write failing test => Version5UuidSetter#object_has_uuid?
returns false without uuid
Create NGR::ReaderWriter macro to provide generic objects for testing
(green) Make test pass => Version5UuidSetter#object_has_uuid? returns
false without uuid

- Create macro to provide generic objects for testing
- add object_has_uuid?
- refactor test to it explicitly test for false
(red) Version5UuidSetter#object_has_uuid? returns true with uuid
(green) Make test pass => Version5UuidSetter#object_has_uuid? returns
true with uuid
Add SRO::ReadWrite class to README.doc