help supports inheritance

lib/WebGUI/Help/_help.skeleton

@@ -9,6 +9,11 @@ our $HELP = {  ##hashref of hashes
 
 		title => 'help article title',  #The title and body are looked up in the
 		body => 'help article title',	#i18n file of the same name
+		# use the following to inherit stuff from another help entry
+		isa => {
+			tag => 'some other help tag',
+			namespace => 'some other help file',
+			},
 		fields => [	#This array is used to list hover help for form fields.
                         {
                                 title => 'form label 1',
@@ -22,6 +27,12 @@ our $HELP = {  ##hashref of hashes
                                 namespace => 'namespace',  #The namespace is called out explicitly
                         },
 		],
+		variables => [
+			{
+				name => "template.variable.name",
+				description => "international tag in this namespace describing this var"
+			},
+		],
 		related => [  ##This lists other help articles that are related to this one
 			{
 				tag => 'other help article',