* Add new Effects
* add schema file for gif based effects
* add background color to snake effect
* add background color to snake effect
* Update schema file for snake effect
* Add function getImage
* add function getImage
* optimize lights.gif
* Add format to GIF schema
- snake has a nice tail
- random is not so fast anymore
- merge sparks and sparks-color
- make more params available in json files
Former-commit-id: fc2a4f6f6ce2b44a35a75a9c0dbe36504b790be9