Switched over to using one view function for entering a trail,
regardless of whether or not an initial pano was passed in.
Not sure why I waited this long to do this.
- Wrote function to request more panos for the trail
- Fixed up queries in view functions. One query and then filtering
  of those results. Not sure if this is better, but it is definitely
  not worse.
- Changed URLs to be all lower case (not sure why they weren't to begin with)
- Fixed the URL for getting a map to use the url tag instead of being hardcoded.