Need to document a couple of new layer and class level tags for HTML legend output.

[sdlime]

To create base data (XML or javascript) via the HTML legend code we need to 
expose a few more bits of information via tags. So, I have added:

Layer context

1)[leg_layer_group] gets the layer group name
2)[leg_layer_index] gets the layers mapfile index value (useful for ordering)
3)[leg_layer_minscale]/[leg_layer_maxscale] get the layer scale boundaries

Class context

1)[leg_layer_name] gets the parent layer name
2)[class_layer_index] gets the classes mapfile index value (useful for ordering 
and legend icon creation)
3)[class_layer_minscale]/[class_layer_maxscale] get the class scale boundaries

Steve

[jmckenna@…]

working on this now

[jmckenna@…]

updated on http://mapserver.gis.umn.edu/docs/howto/html_legend

[class_layer_index]  => changed to [leg_class_index]
[class_layer_minscale] => changed to [leg_class_minscale]
[class_layer_maxscale] => changed to [leg_class_maxscale]

[jmckenna@…]

i also tested each of the new tags.