#2326: describe behavior of having no non-datavalue as by design.  Also change all examples to explicitly specify band (though we have only 1 band anyway) for anal clarity.

git-svn-id: http://svn.osgeo.org/postgis/trunk@11458 b70326c6-7e19-0410-871a-916f4a2858ee
#2326: describe behavior of having no non-datavalue as by design.  Also change all examples to explicitly specify band (though we have only 1 band anyway) for anal clarity. (forgot edits in last commit

git-svn-id: http://svn.osgeo.org/postgis/trunk@11459 b70326c6-7e19-0410-871a-916f4a2858ee
alphabetize raster processing section - impossible to find stuff otherwise

git-svn-id: http://svn.osgeo.org/postgis/trunk@11460 b70326c6-7e19-0410-871a-916f4a2858ee