Added advanced particle size control and new Blob FX

- advanced size control allows for growing, shrinking, wobbling
- render function updated to support asymmetric rendering
- various code improvements and bugfixes
- some FX parameter tuning
- bugfix: removed sli() sei() calls in render function that caused random flickering on S3/C3 (may add that back in but only for ESP8266 to reduce fragmentation)
- removed some debug / test stuff