initial commit for spec

## Problem
No matter what AggWindow is being used, if rain data-layer is turned on the animation will start animating over a 5 min window, whilst the timeline will switch to other stores. From a certain aggwindow (day - month) it would make more sense to start animating day images in stead of 5 min images.

## Solution
A list of aggregation windows/ time resolutions, that map to different urls to retrieve a different set of animation frames.

### TODO
- [ ] refactor temporal resolution
- [ ] trigger lookup in list.