mapHolderRef only gets attached to direct child

[nickhs]

Great library! Just one hiccup I've noticed so far:

When including a child in <GoogleMap> that could include an object (such as a Marker) the magic mapHolderRef property doesn't get attached to the underlying Marker object.

For example creating a structure something like:

<GoogleMap />
    <MyMarkerHolder />
         <Marker />

Will result in none of the <Markers /> having the necessary property set. The current workaround is to add a property in MyMarketHolder that establishes the link:

<GoogleMap />
     <MyMarketHolder mapHolderRef={this.props.mapHolderRef} />
         <Marker />

The relevant code in creators/GoogleMapHolder.js - perhaps that should be something like a recursive descent instead?

[tomchentw]

Something like <MyMarketHolder> is not currently supported. And I think you're right, right now in MyMarkerHolder#render you have to manually pass down mapHolderRef to children (Marker).

[replaid]

I hit this too. Would you consider documenting this decision?

[tomchentw]

Close for #266 now.

We're also looking for maintainers. Involve in #266 to help strengthen our community!