added section on attribute summarization / charts / wps

Author: Syrus

README.md

@@ -9,6 +9,9 @@ MapLoom has been built using [OpenLayers 3](http://ol3js.org), Angular, and Boot
 
 License: The MapLoom source code is licensed under the [BSD 3 clause](http://opensource.org/licenses/BSD-3-Clause) license. 
 
+### WPS & Feature Type Attributes Statistics Considerations
+We are utilizing Geoserver Web Processing Services in a couple of places. For example, the 'zoom to layer data' uses a wps that is already included in geoserver. In the layer's table view, we have added the ability to view charts and statistics on the attribute values for the whole layer or a set of filtered features of a layer. To Accomplish this, we created a custom WPS called summarize_attrib which is using the geoscript functionality in geoserver. When the summarize/statistics button is clicked in maploom, geoserver will need to have the wps available. If you are using a geoserver instance that was created and configured using the [geoshape](http://www.geoshape.org) script, everything will be taken care of already and you do not need to do anything mentioned here. If you are using a different deployment of geoserver, you'll need: 1) the geoserver wps extention, 2) commons-math3-3.3.jar, 3) geoserver-2.5-SNAPSHOT-python-plugin.zip, and 4) the [scripts folder](https://github.com/ROGUE-JCTD/geoserver_data/blob/master/scripts)
+
 ## Quick Start
 
 Install Node.js and then: