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Include Nyquist bin, halve it for even lengths (Morse)#14

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Include Nyquist bin, halve it for even lengths (Morse)#14
OverLordGoldDragon wants to merge 1 commit intojonathanlilly:masterfrom
OverLordGoldDragon:master

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Addresses #13.

Note that for odd lengths, not halving last bin (non-Nyquist) is proper and preserves analyticity, but loses fast decay. This decay seems irrelevant for CWT, but not if otherwise working directly with time-domain wavelet. This is conveniently worked around if CWT pads up to next-highest power of 2 (e.g. reflective padding), alleviating boundary effects and yielding analyticity w/ fast decay.

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