* include/functions_gis.php: change the setup params "maxExtent",
"maxResolution", "numZoomLevels" from map to baselayer. Add new function
"getAgentsLayer" to get agent info of agents in layer, but only agents not
in group in layer.
* operation/gis_maps/render_view.php: use new function "getAgentsLayer".
* operation/gis_maps/ajax.php: fix the extract agent gis info, and clean
source code.
git-svn-id: https://svn.code.sf.net/p/pandora/code/trunk@2418 c3f86ba8-e40f-0410-aaad-9ba5e7f4b01f