MarkerCluster Styles: Fix css injection, if document is not yet loaded

(Leaflet only)
PointDataMarker: fix default offset

- was mistakenly set to 50px instead of 12px
TileAnimation: set default from to 2 hours ago
TileAnimation: Trigger 'change:from/to' after load:times

when time bounds are reset to reflect actual loaded times
Animation: ensure time is within from/to bounds

when from/to bounds change
AnimationSync#goToTime: normalize time param
Demo fixes

- Use correct aeris build, as needed
- Fix AnimationSync from/to time controls
- Add missing dependencies
Upgrade to v0.7.6