New path properties presentation option for same-path visits with query strings

[jayohms]

Addresses: #157

The (new) default behavior will no longer ignore query strings to evaluate if locations are the same. To use the previous behavior, use the new query_string_presentation path configuration option:

{
  "patterns": [
    "/feature"
  ],
  "properties": {
    "query_string_presentation": "replace"
  }
}