Provide more information to print services.

WMS Layer z-order and opacity.
The full list of OL map geometry parameters:
	geographic extent,
	geographic center point,
	map scale denominator,
	map resolution (px per ground unit),
	map projection,
	image size.
Remove trailing comma.
Merge pull request #8 from klassenjs/better_printing

Better printing
Merge pull request #9 from klassenjs/better_wms_legends

Fix WMS legends to be more complient with spec.
Fixed issue with USNG error when USNG is not included
added scale smart catalog directives, refs: #7