Implemented static legend image support on WmsLayer
Set correct static legend image height and width

Conflicts:
	plugin/geomajas-layer-wms/wms/src/main/java/org/geomajas/layer/wms/WmsLayer.java
Set correct static legend image height and width

Conflicts:
	plugin/geomajas-layer-wms/wms/src/main/java/org/geomajas/layer/wms/WmsLayer.java
Refactored resource retrieval for static legend images

Conflicts:
	plugin/geomajas-layer-wms/wms/src/main/java/org/geomajas/layer/wms/WmsLayer.java
Cleaned up WmsLayer and fixed maven dep scope
removed unnneeded method
Merge branch 'feature/legendGraphics-520' into development