ENH: cleanup wordRe interfaces etc.

- ensure that the string-related classes have consistently similar
  matching methods. Use operator()(const std::string) as an entry
  point for the match() method, which makes it easier to use for
  filters and predicates. In some cases this will also permit using
  a HashSet as a match predicate.

regExp
====
- the set method now returns a bool to signal that the requested
  pattern was compiled.

wordRe
====
- have separate constructors with the compilation option (was previously
  a default parameter). This leaves the single parameter constructor
  explicit, but the two parameter version is now non-explicit, which
  makes it easier to use when building lists.

- renamed compile-option from REGEX (to REGEXP) for consistency with
  with the <regex.h>, <regex> header names etc.

wordRes
====
- renamed from wordReListMatcher -> wordRes. For reduced typing and
  since it behaves as an entity only slightly related to its underlying
  list nature.

- Provide old name as typedef and include for code transition.

- pass through some list methods into wordRes

hashedWordList
====
- hashedWordList[const word& name] now returns a -1 if the name is is
  not found in the list of indices. That has been a pending change
  ever since hashedWordList was generalized out of speciesTable
  (Oct-2010).

- add operator()(const word& name) for easy use as a predicate

STYLE: adjust parameter names in stringListOps

- reflect if the parameter is being used as a primary matcher, or the
  matcher will be derived from the parameter.
  For example,
      (const char* re), which first creates a regExp
      versus (const regExp& matcher) which is used directly.

applications/utilities/postProcessing/dataConversion/foamToVTK/foamToVTK.C

@@ -199,7 +199,7 @@ void print(Ostream& os, const wordList& flds)
 labelList getSelectedPatches
 (
     const polyBoundaryMesh& patches,
-    const List<wordRe>& excludePatches
+    const wordRes& excludePatches
 )
 {
     DynamicList<label> patchIDs(patches.size());
@@ -219,7 +219,7 @@ labelList getSelectedPatches
             Info<< "    discarding empty/processor patch " << patchi
                 << " " << pp.name() << endl;
         }
-        else if (findStrings(excludePatches, pp.name()))
+        else if (excludePatches.match(pp.name()))
         {
             Info<< "    excluding patch " << patchi
                 << " " << pp.name() << endl;
@@ -379,7 +379,7 @@ int main(int argc, char *argv[])
 
     const bool allPatches = args.optionFound("allPatches");
 
-    List<wordRe> excludePatches;
+    wordReList excludePatches;
     if (args.optionFound("excludePatches"))
     {
         args.optionLookup("excludePatches")() >> excludePatches;