Added WMSGetFeatureInfo control. Thanks dwins for the patch. I made the

following modifications:
 * WMSGetFeatureInfo class was contained twice in WMSGetFeatureInfo.js. 
Removed one.
 * Fixed @requires
 * Added vendorParams option (with test) to allow for e.g. adding custom 
params like RADIUS
 * Changed the clickPosition key in the getfeatureinfo event parameter 
to xy to comply with other event parameters in OpenLayers
 * Modified concatenation of layerNames and styleNames as proposed in my 
previous comment
 * Made a separate handleResponse function from the previously closured 
callback function and added xy to the scope
 * Fixed some ND comments, especially removed links (<..>) from object 
types that cannot be linked (e.g. {String})
 * Inserted line breaks where lines exceeded 80 chars
 * Fixed test for format option, because this is now formats and has a 
different type
 * Fixed tests in the example (this is no US census data)
 * added ProxyHost and absolute WMS url to the example
 * removed custom format from the click handler in the example so users 
can also see the simpler instantiation with the default formats
r=me (closes #2007)


git-svn-id: http://svn.openlayers.org/trunk/openlayers@9159 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf

lib/OpenLayers.js

@@ -163,6 +163,7 @@
             "OpenLayers/Control/SelectFeature.js",
             "OpenLayers/Control/NavigationHistory.js",
             "OpenLayers/Control/Measure.js",
+            "OpenLayers/Control/WMSGetFeatureInfo.js",
             "OpenLayers/Geometry.js",
             "OpenLayers/Geometry/Rectangle.js",
             "OpenLayers/Geometry/Collection.js",