updated fire, added some functions to PS, ported attractor FX

- added turbulance to fire (after hours of fine-tuning) it now looks even more awesome
- added attractor animation back in and improved it with more functionality
- fixed the attractor function in the PS
- renamed FX: 'candy' is now called 'vortex'
- added new force function to apply a force immediately (and handle the timing in the FX)
- added update function to PS for size update to handle dynamic segment size change
- made waterfall width dynamic on segment width
- removed some debug stuff
- added #defines for maximum number of particles/sprays
- updated fire parameter to make it look better on ESP8266
- some little bugfixes