Update LICENSE.md
Update Cesium.

Among other things, this fixes a bug that resulted in displaying less detailed terrain.
Don't double-URL-encode WMS layer names.
Merge pull request #378 from NICTA/dontDoubleEncode

Don't double-URL-encode WMS layer names.
Merge branch 'master' of https://github.com/NICTA/nationalmap into leafletCsv
labels and icon fixes