some issues on ObjectVersionId

[Diego Manhães Pinheiro]

The ObjectVersionId must include the following enhancements:

- Use UIDMatcher class to fix the problem on repeat the same regular expressions found on ISOOID, InternetID and UUID classes.
- Use the SEPARATOR constant to split the identifier parts.
- Cover the class with tests.
- Compile out of the class all regular expressions to speed up the initialization process.
- Return the lexical form when the str or the unicode builtin methods are applied on the object.
- Allow pass a list of objects representing the identifier splited up into three parts: a UID object represeting the object_id part, an UID object representing the creating_system_id part and an VersionTreeId object representing the version_tree_id part.