message: Add force property override feature to patcher
  This has a variety of applications, but is particularly useful when we want to replace arrays instead of add onto them
diff: @@ -961,6 +961,15 @@ static void patchJSON(json* base, json* patch) {
  std::string key = _prop.key(); // static identifier
  json* valLoc = &(*_prop); // pointer to json data
  + // special casing for forced replacement.
  + // the ! is stripped, then the property is forcibly replaced without a recursive call
  + // that means no type checking, so use at your own risk
  + if (key.c_str()[0] == '!') {
  + key = key.substr(1, key.length() - 1);
  + (*base)[key] = *valLoc;
  + continue;
  + }
  +
  // search for matching property in base object
  json::iterator _match = base->find(key);
  if (_match != base->end()) {
  