Nes: implement vibrato, also: make main pitch update at 60hz frequency regardless of period size or samplerate (guarantees consistency in sound for combined pitch sweep + pitch automation)
Merge pull request #784 from diizy/nes

Nes: implement vibrato, also: make main pitch update at 60hz frequency r...
Nes: added pitch sweep for noise channel, freq.quantize mode (constrain frequencies to preset values when using note frequency)
Also added a handful of neat presets that mimick Nes sound effects
Nes: Fix previous - forgot to add new models to load/save funcs
Merge pull request #785 from diizy/nes

Nes updates
FxMixerView: fix crash when loading project while selected channel != 0
Fixes #782