factor out the load_assembler class

[Mirv]

• move dependencies
• class header & inheritance
• expose data hash
• initializer for values (checks or not as top tier should validate)
• hand_process to become the class's primary method
• raise error on
• ensure calls below work
• guest object should check it's hash have values before returning
• guest object should return nil or error if hash doesn't have valid data in it
• loadTemplate needs adjustment
• loadCompany needs adjustment
• ensure errors still report dynamic locations correctly