Draw two dummy linear assets on map
Implement select of linear asset
linear asset geometry changing
Remove unnecessary code
Extract asset layer from base map
Fix add new asset
Cleanup linear asset layer
Implement basic linear asset drawing
Remove POC code
Merge branch 'linear-asset-layer'

Conflicts:
	UI/src/bundles/digiroad2/bundle/assetlayer/AssetLayer.js
	UI/src/utils/backend-utils.js