Added the delay attribute and made more examples

[apalala-dev]

I added the delay attribute as suggested in #17 and made some examples with clippers aswell.
I didn't update the README file : you mention an other repository with examples there but the example folder in this repo seems newer so I let choose what to do with it 😅

[maddyb99]

I will look at this tomorrow.
I still feel a single controller is the way to go because even a slight difference in rendering time might lead the animations to diverge, I'm not sure though. A single controller would also ensure less manual work on the part of the developer for synchronisation.

Will test out a couple of scenarios on your implementation to see if this works.