Fix derp code
Remove legacy code
Add abstraction to Attribute class
Add pool argument to Attribute#parse
Remove return
Refactor to name_index
Add name member to Attribute class
Add parse_name method to parse the initial bytes
Add set_name related to parse_name
Simplify attribute parsing of fields
Refactor set_name to set_attributes
Refactor to save space
Add length to static Attribute parsing
Give JavaClassMember methods from Field
Refactor length field in TabledAttribute