[DRAFT] Rework Proposal

Here is a proposal to rework an improvement Imager.js based on my previous work, in a more collaborative way.

So here is the vision, each of the following points are issues (which will become PR):

# Imager.js

* [ ] `data-src` format – #21
* [ ] `data-src` + Value interpolation – #23
* [ ] `data-src` + Pixel ratio variable – #27
* [ ] Constructor API – #22
* [ ] Constructor options – #?
* [ ] Update API – #24
* [ ] Triggering on Events/Manually – #25
* [ ] Delaying width calculation and `src` replacement – #26

# Strategies

* [ ] Strategy implementation (as config or build file) – #28
* [x] Replacing the placeholder by a responsive image – *this is the actual way of doing things*
* [ ] Enclosing the responsive image in the placeholder – #?