issue #4: added clipboard functionality (& options)

[roxaloxa]

applies to #4

added the ability to copy to clipboard and then setting the preference in options on whether you want save file, copy clipboard, or both to happen.

(also apologies, i just now realized my prettier extension tidied up a bunch of other lines... if that's annoying, reject and i'll fix and resubmit)

[FutureMillennium]

Thanks a lot! I would prefer to not have cosmetic changes in the diffs. Could you resubmit?

[roxaloxa]

no problem, got that one incoming shortly. gonna close this one 👍