Endpoints for testing GPS tracker

Endpoints: 

POST: /routes/{routeShort}/trips/{tripId}/location
Body Parameters: lat, lng, created (optional)

GET: /routes/{routeShort}/trips/{tripId}/location

Example: 

```bash
curl --data "lat=10.24059&lng=-80.240586" http://smsbus.miamicode.org/routes/101/trips/10/location
```