PolylineGlowMaterialProperty doc fix
PolylineGlowMaterialProperty doc fix

PolylineGlowMaterialProperty was being referred to as
`PolylineGlowProperty` in both the doc and module declaration. This is a
non-breaking change, it was always `Cesium.PolylineGlowMaterialProperty`
in the actual API.

We should take this for 1.7.

YonatanKra/cesium,josh-bernstein/cesium,emackey/cesium,likangning93/cesium,likangning93/cesium,ggetz/cesium,wallw-bits/cesium,jasonbeverage/cesium,emackey/cesium,progsung/cesium,YonatanKra/cesium,wallw-bits/cesium,ggetz/cesium,AnimatedRNG/cesium,AnimatedRNG/cesium,aelatgt/cesium,oterral/cesium,esraerik/cesium,hodbauer/cesium,likangning93/cesium,esraerik/cesium,AnimatedRNG/cesium,CesiumGS/cesium,emackey/cesium,omh1280/cesium,denverpierce/cesium,CesiumGS/cesium,likangning93/cesium,aelatgt/cesium,wallw-bits/cesium,hodbauer/cesium,kiselev-dv/cesium,soceur/cesium,ggetz/cesium,CesiumGS/cesium,kiselev-dv/cesium,kiselev-dv/cesium,aelatgt/cesium,kaktus40/cesium,wallw-bits/cesium,CesiumGS/cesium,likangning93/cesium,NaderCHASER/cesium,soceur/cesium,jasonbeverage/cesium,kaktus40/cesium,soceur/cesium,oterral/cesium,esraerik/cesium,oterral/cesium,ggetz/cesium,progsung/cesium,omh1280/cesium,emackey/cesium,omh1280/cesium,kiselev-dv/cesium,YonatanKra/cesium,YonatanKra/cesium,omh1280/cesium,AnimatedRNG/cesium,NaderCHASER/cesium,jason-crow/cesium,AnalyticalGraphicsInc/cesium,denverpierce/cesium,jason-crow/cesium,denverpierce/cesium,aelatgt/cesium,geoscan/cesium,geoscan/cesium,CesiumGS/cesium,jason-crow/cesium,denverpierce/cesium,esraerik/cesium,AnalyticalGraphicsInc/cesium,hodbauer/cesium,josh-bernstein/cesium,NaderCHASER/cesium,jason-crow/cesium