Flesh out WMTS code. This does not work yet. WIP

I'm submitting this since it's the end of the course period. This is
unfinished work.
TemperatureResource: tabs to spaces. Noop.
Add salinity and temperature depth profile endpoints
Fix some mistakes. Add some technical references in sprints
Added indexer code, it is not used (WIP)
Merge pull request #17 from stoutbeard/profile

Flesh out WMTS code. This does not work yet. WIP