nuts 1.0.0

• First release
• nuts is now a part of rOpenSci after peer-review!
• Functions were renamed to be consistent with rOpenSci's style guide
• Verbosity control was added
• Repeated chunks of code were reorganized into functions
• Option for summarizing missing weights included
• User interface rewritten with cli
• Imports were further reduced
• Tests were reorganized and expanded
• Documentation was updated