Third party code.
Place downloaded third party code in this folder if instructed to by GMap.

(todo: document better)

Clusterer2.js
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Marker clusterer addon by Jef Poskanzer, adpated by Etienne Châtaignier to work with Google Map API V3
This was the original "marker clustering" solution for viewing large sets of markers without
loss of speed.
Download at https://github.com/melicerte/clusterer
Original plugin Website: http://www.acme.com/javascript/#Clusterer
Save the results of the [View source code.] link.
Tested version at: http://www.acme.com/javascript/Clusterer2.js

wms-gs-1_0_1.js
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WMS support library.
The specifics are still up in the air at this point.

http://geoserver.org/display/GEOSDOC/Google+Maps
http://chignik.berkeley.edu/google/wms236.js
http://dist.codehaus.org/geoserver/gmaps-geoserver_scripts/wms-gs-1_0_0.js
http://dist.codehaus.org/geoserver/gmaps-geoserver_scripts/wms-gs-1_0_1.js

ClusterMarker.js
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Marker clusterer addon by Martin Pearman
This is a new "marker clustering" solution similar to Clusterer2.js.
Website: http://googlemapsapi.martinpearman.co.uk/articles.php?cat_id=1
Tested version: 1.3.2

MarkerManager.js
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Google Maps API Utility Library addon
This is an improved version of GMarkerManager.
Website: http://code.google.com/p/gmaps-utility-library-dev/
Tested version: 1.0

MarkerClusterer.js
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Google Maps API Utility Library addon
This javascript library creates and manages per-zoom-level clusters for large amounts of markers (hundreds or thousands).
Website: http://code.google.com/p/gmaps-utility-library-dev/
Tested version: 1.0