Using prototype

[marcandre]

I want to make a small modification to the code so that the object we're building would have a prototype, which would be the current methods.

This would have the advantage that instead of $.featherlight.methods.open.call(this) one could simply do this.open().

It would also make it easier/better for extensions I think

One thing I'm considering is merging the config with the object, i.e. instead of self.config.closeOnClick, why not self.closeOnClick directly?

This would also blur the difference between the callbacks like afterOpen and the method like open. In the doc it would be clear that one is meant to be overridden and not the other, but both could be.

We could set self.config = self for compatibility, so both accesses work?

@noelboss thoughts on this?

[marcandre]

Mostly done & pushed. The rest in branch for 0.4