Go for "1.0"

* Set API version to 1.0 (THIS CHANGES ENDPOINTS!)
* do not store position history into database
* clean up position data after config period (default for 5 days)
Apologies for not being more Go-savvy, is this trying to pull a config from the server's [config.ini](https://github.com/mozilla-services/FindMyDevice/blob/master/config-sample.ini) file first, and using _5 days_ as a fallback? Can/should we update the config-sample.ini to show this configurable option (even if we comment it out)?