STYLE: centralize example dictionaries under etc/ (issue #1074)

- as well as being more convenient to find, this is necessary when the
  OpenFOAM installation is without sources or tutorials

applications/utilities/mesh/generation/snappyHexMesh/meshQualityDict

-/*--------------------------------*- C++ -*----------------------------------*\
-| =========                 |                                                 |
-| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
-|  \\    /   O peration     | Version:  v1812                                 |
-|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
-|    \\/     M anipulation  |                                                 |
-\*---------------------------------------------------------------------------*/
-FoamFile
-{
-    version     2.0;
-    format      ascii;
-    class       dictionary;
-    object      meshQualityDict;
-}
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-// Include defaults parameters from master dictionary
-#includeEtc "caseDicts/meshQualityDict"
-
-
-// ************************************************************************* //

applications/utilities/preProcessing/mapFields/mapFieldsDict

-/*--------------------------------*- C++ -*----------------------------------*\
-| =========                 |                                                 |
-| \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox           |
-|  \\    /   O peration     | Version:  v1812                                 |
-|   \\  /    A nd           | Web:      www.OpenFOAM.com                      |
-|    \\/     M anipulation  |                                                 |
-\*---------------------------------------------------------------------------*/
-FoamFile
-{
-    version     2.0;
-    format      ascii;
-    class       dictionary;
-    object      mapFieldsDict;
-}
-// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
-
-// List of pairs of target/source patches for mapping
-patchMap
-(
-    lid movingWall
-);
-
-// List of target patches cutting the source domain (these need to be
-// handled specially e.g. interpolated from internal values)
-cuttingPatches
-(
-    fixedWalls
-);
-
-// ************************************************************************* //

etc/caseDicts/annotated/README.md

+Annotated Dictionaries
+----------------------
+
+This directory contains a collection of example dictionaries which can
+be used as a reference for some of the available options.

applications/utilities/preProcessing/mapFieldsPar/mapFieldsDict → etc/caseDicts/annotated/mapFieldsDict

@@ -10,7 +10,7 @@ FoamFile
     version     2.0;
     format      ascii;
     class       dictionary;
-    object      mapFieldsParDict;
+    object      mapFieldsDict;
 }
 // * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //