Copasul

* `sigFunc.pau_detector_merge()`: merging of chunks across too short pauses no comes before merging pauses across too short chunks (expected to work better for dialogs with short backchannel chunks)

* chunk-final syllable boundary time stamp added
* new phrase boundary and accent bootstrapping method working without previous word segmentation: `'seed_minmax'`

* pre-emphasis for spectral balance calculation now possible in time and frequency domain (the latter according to Fant et al, 2000)
* new sub-dictionary `opt['styl']['gnl_en']['sb']` for spectral balance settings:
* `'domain'`: `'time'` or `'freq'`; in which domain to do pre-emphasis and SPLH-SPL calculation
* `'alpha'`: for time-domain pre-emphasis. If `>1` it is interpreted as the lower boundary frequency from which on pre-emphasis is to be carried out.
* `'win'`: length of center window in sec within which spectral balance is to be calculated; default: -1 (length of segment)
* `'btype'`: filter type to specify frequency band relevant for spectral balance calculation: `<'none'>|'low'|'high'|'band'`
* 'f': cutoff frequency/ies for `'btype'` (default: -1, i.e. no filtering)
* `styl:gnl\_en:alpha` is deprecated and replaced by `styl:gnl\_en:sb:alpha`

* `copasul_styl.styl_std_quot()` now robust against empty input vectors
* `copasul_augment.pau_detector_red()`: bugfix for `opt['fbnd']==True`

* output tables: column separator now can freely be chosen (default ',')

* chunking: silence margins can be set at chunk starts and ends