Add support for sending in lat/log measures to request

[jboarman]

Currently, we can query for N records within X miles of a postalCode.

However, it would be helpful to request matches nearest a lat/long so that a browser's location API can be used to source the end-users location center.

Using a Lat/Long Center

/nearest/{count}/{sourceType}/to/{latitude}/{longitude}/within/{miles}
or
/nearest/{count}/{sourceType}/to/{latitude_longitude}/within/{miles}

The format of the lat/long could either be as separate parameters or perhaps it needs to be in a single parameter formatted like (32.947560, -96.839760) if the route parser can't disambiguate between other route paths.