functionObjects: rewritten to all be derived from 'functionObject'

- Avoids the need for the 'OutputFilterFunctionObject' wrapper
  - Time-control for execution and writing is now provided by the
    'timeControlFunctionObject' which instantiates the processing
    'functionObject' and controls its operation.
  - Alternative time-control functionObjects can now be written and
    selected at run-time without the need to compile wrapped version of
    EVERY existing functionObject which would have been required in the
    old structure.
  - The separation of 'execute' and 'write' functions is now formalized in the
    'functionObject' base-class and all derived classes implement the
    two functions.
  - Unnecessary implementations of functions with appropriate defaults
    in the 'functionObject' base-class have been removed reducing
    clutter and simplifying implementation of new functionObjects.
  - The 'coded' 'functionObject' has also been updated, simplified and tested.
  - Further simplification is now possible by creating some general
    intermediate classes derived from 'functionObject'.

src/sampling/probes/patchProbes.H

@@ -128,6 +128,14 @@ public:
 
     // Constructors
 
+        //- Construct from Time and dictionary
+        patchProbes
+        (
+            const word& name,
+            const Time& time,
+            const dictionary& dict
+        );
+
         //- Construct for given objectRegistry and dictionary.
         //  Allow the possibility to load fields from files
         patchProbes
@@ -146,15 +154,16 @@ public:
     //- Public members
 
         //- Sample and write
-        virtual void write();
+        virtual bool write();
 
         //- Read
-        virtual void read(const dictionary&);
+        virtual bool read(const dictionary&);
 
         //- Find elements containing patchProbes
         virtual void findElements(const fvMesh&);
 };
 
+
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
 } // End namespace Foam