Utility sample: replaced by 'postProcess -func sample'

To re-use existing 'sampleDict' files simply add the following entries:

    type sets;
    libs ("libsampling.so");

and run

    postProcess -func sampleDict

It is probably better to also rename 'sampleDict' -> 'sample' and then run

    postProcess -func sampleDict

bin/patchAverage

@@ -32,6 +32,6 @@
 Script=${0##*/}
 
 echo $Script "has been superceded by the postProcess utility:"
-echo "postProcess -func '"$Script"(name=inlet,p)'"
+echo "    postProcess -func '"$Script"(name=inlet,p)'"
 
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