Fix type for viewListenKey_
Merge pull request #97 from ahocevar/fix-type

Fix type for viewListenKey_
Remind the compiler of the type of olLayer

This closure is created in an if-block for ol.layer.Group instances only.
Merge pull request #99 from ahocevar/cast-type

Remind the compiler of the type of olLayer
3D description for vectors example multi-polygons.

Fix assertion is ol3 debug.
Make raster synchronizer only destroy its own layers.

Was destroying all Cesium imagery layers.
Simplify vector synchronizer Cesium object type.
Add `@api` annotation to some functions.
Point and MultiPoint conversion optimizations

Point: in the absence of text style, return the billboard collection.
MultiPoint: share the billboard collection between all points of a MultiPoint.

MultiPoint improvement was tested with 32 multipoints of 1000 points each.
The globe is completly fluid.
Add BillboardCollection length to Cesium externs
Add Label to Cesium externs
Options typedef for feature conversion

Introduce an options parameter for clarity.
Ol layer primitive
Added random style synthetic vectors example

Creates layers of 1K points.
Feature conversion context.

Allows the sharing of a unique billboard collection between converter calls.
Will allow the sharing of a unique label collection.
Set feature id on individual billboards

Updated the synthetic vector example with picking showcase.
Add billboards unconditionally
Feature removal by using a map
Change example to work with a single layer/source
Fix id handling for map keys