Does not support layers of fixedWidth or fixedHeight
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                 Key: GEOT-1506
                 URL: http://jira.codehaus.org/browse/GEOT-1506
             Project: GeoTools
          Issue Type: Bug
    Affects Versions: 2.5-M0, 2.4-RC0, 2.3.4, 2.3.3, 2.3.2, 2.3.1, 2.2.2
            Reporter: Jody Garnett


In the WMS 1.1.1 specification the following layer parameters are defined:
- fixedWidth 0, positive integer \\ 0: WMS can resize map to arbitrary width. 
\\ nonzero: map has a fixed width that cannot be changed by the WMS.
- fixedHeight 0, positive integer \\ 0: WMS can resize map to arbitrary height. 
\\nonzero: map has a fixed height that cannot be changed by the WMS.

These layer attributes are optional and we have never seen them in the wild - 
until now:
- http://aes.gsfc.nasa.gov/cgi-bin/wms?%20SERVICE=WMS

The above service serves up fixed sizes images and has no ability to resize!
Our GetMap implementation should do one of two things:
- request this fixed size and then resample as required (so the GridCoverage 
returned exactly matches the request)
- retrive the GridCoverage as returned by the server and let the client code 
deal with it

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