ENH: Function1 and PatchFunction1 improvements (#1917)

- easier support for non-mandatory functions.

  In some boundary conditions it can be desirable to support
  additional functions, but not necessarily require them. Make this
  easier to support with a Function1, PatchFunction1 NewIfPresent()
  selector.

- support for compatibility lookups

- harmonize branching logic and error handling between Function1 and
  PatchFunction1.

ENH: refactor a base class for Function1, PatchFunction1

- includes base characteristics, patch or scalar information

ENH: additional creation macros

- makeConcreteFunction1, makeConcretePatchFunction1Type for adding a
  non-templated function into the correct templated selection table.
  makeScalarPatchFunction1 for similarity with makeScalarFunction1

etc/codeTemplates/dynamicCode/codedPatchFunction1Template.H

@@ -75,7 +75,7 @@ public:
         ${typeName}PatchFunction1${FieldType}
         (
             const polyPatch& pp,
-            const word& type,
+            const word& redirectType,
             const word& entryName,
             const dictionary& dict,
             const bool faceValues = true
@@ -84,13 +84,13 @@ public:
         //- Copy construct
         ${typeName}PatchFunction1${FieldType}
         (
-            const ${typeName}PatchFunction1${FieldType}&
+            const ${typeName}PatchFunction1${FieldType}& rhs
         );
 
         //- Copy construct, resetting patch
         ${typeName}PatchFunction1${FieldType}
         (
-            const ${typeName}PatchFunction1${FieldType}&,
+            const ${typeName}PatchFunction1${FieldType}& rhs,
             const polyPatch& pp
         );