make EntityOwner::findTagAndAppendToModule() public

When writing special modules (e.g. the MicroDAQ module) it may be necessary to both override and call this function explicitly.

include/EntityOwner.h

@@ -232,13 +232,13 @@ namespace ChimeraTK {
     template<typename T>
     static std::string constant(T value);
 
-   protected:
     /** Add the part of the tree structure matching the given tag to a
      * VirtualModule. Users normally will use findTag() instead. "tag" is
      * interpreted as a regular expression (see std::regex_match). */
     virtual void findTagAndAppendToModule(VirtualModule& virtualParent, const std::string& tag,
         bool eliminateAllHierarchies, bool eliminateFirstHierarchy, bool negate, VirtualModule& root) const;
 
+   protected:
     /** The name of this instance */
     std::string _name;