name_splitter

bumps version and updates gem file

Additional improvements in handling last name first, either with the option provided or not

allows for multiple last names when the last name is first separated by a comma

When the last name is first, it can be helpful to tell the splitter this, so it can handle it properly even if no space is provided between the comma and the first name

updates splitter and specs to bring it up to some semblance of standards