Update CHANGES.md with release date
Update CHANGES.md with release date

The Breaking change section was also moved to the first position and uses
a bullet style.

openlayers/ol3-cesium,epointal/ol3-cesium,bartvde/ol3-cesium,gejgalis/ol3-cesium,bartvde/ol3-cesium,GistdaDev/ol3-cesium,thhomas/ol3-cesium,fredj/ol3-cesium,oterral/ol3-cesium,thhomas/ol3-cesium,oterral/ol3-cesium,gberaudo/ol3-cesium,gejgalis/ol3-cesium,openlayers/ol-cesium,thhomas/ol3-cesium,fredj/ol3-cesium,gberaudo/ol3-cesium,openlayers/ol-cesium,epointal/ol3-cesium,gejgalis/ol3-cesium,fredj/ol3-cesium,GistdaDev/ol3-cesium,openlayers/ol3-cesium