Reverb and Auto-UI

New Generators
- Reverb
- ControlParameter (replaces parameter struct)
- ControlDelay

Under-the-hood
- All effects have dry level, wet level, bypass inputs
- Code optimizations to tick/tickThrough for effects
- Frames operators can handle arguments with different numbers of channels (2 channel frame buffer multiplied by 1 channel frame buffer, for example)

Demos support Auto-UI slider/button creation