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
