Fix external processor allocation

- Add channel offset to custom proc interface
Cleaning
Adds List.zip et al
Adds List.zip et al
Fix external processor allocation

- Rewrite Signal.run
Fix external processor allocation

- Adds Signal.in/outputWithCustom
Fix external processor allocation

- Implements Signal.in/outputWithCustom
- Fixes internal routing for Signal.run
Merge branch 'master' of github.com:faudio/faudio