issue #98 process priority

	Element "Process_state"
	Element "priority"
		- oval-sc:EntityItemStringType
		+ type="oval-sc:EntityItemIntType"
		+ The priority value range is from 0 to 31.
	Element "process58_state"
		+ type="oval-sc:EntityItemIntType"
		+ The priority value range is from 0 to 31.

Windows-system-characteristics-schema.xsd
	Element "process_item"
	Element "priority"
		- oval-sc:EntityItemStringType
		+ type="oval-sc:EntityItemIntType"
		+ The priority value range is from 0 to 31.