Auditok

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- Add command line argument to select audio device used by pyaudio
- Add command line argument to select buffer size for pyaudio

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- Add python 3.5/3.6 to test scheme
- Make source pep8 compliant
- Add shortcut names for AudioSource object properties
- Fix Python 3 bug with reading binary data from STDIN

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- Add 'duration' to output keywords

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- Fix description error for --drop-trailing-silence option (wrong default value)
- Bug fix: cmdline.py, take analysis_window into account when initializing a tokenizer object
- Bug fix: cmdline.py, --save-image option, set `record` to True when reading from the microphone
- Bug fix: util.py, method ADSFactory.ads, make a shallow copy of user's `kwargs` before calling _check_normalize_args
- Update documentation (mainly typos fixes)

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- auditok as command line tool
- Rst documentation
- Read audio data from stdin
- Add short alias for all ADSFactory.ads() keyword arguments
- Add tests for alias
- Break audio data into chunks for audio play back (to quickly detect interruptions like Ctrl-C)

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- Bug fix: util.AudioEnergyValidator._formats = {1: 'b' , 2: 'h', 4: 'i'} instead of {1: 'B' , 2: 'H', 4: 'I'}
- Typo fix in code: StreamTokenizer.DROP_TRAILING_SILENCE renamed StreamTokenizer.DROP_TAILING_SILENCE
- Documentation updated