typo
renamed demodulation module to demodulate
renaming modulation to demodulate module
renamed test_demodulation to test_demodulate
renamed to test_demodulate.py
tests working
renamed band_pass_filter to band_pass, since it's in module 'filters'
more adjustions to name band_pass
tests working
shortenned the names in adjoin module. tests working
refactorred names. now using domain_domain_end, instead of first_sample,
last_sample
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