Ross fix empty data

[rosswhitaker]

This resolves the bug of out-of-range index in the createModel function, which was caused by a condition of "no sensor data". That bug came to light because the map_reconfigure is making requests for model estimates in the future, which have no data (obviously). Those future requests are because map_reconfigure is making requests in GMT (or Z) time zones, rather than the local time zone. To fix that, map_reconfigure was modified so that formatDateTime uses the current time zone. However, that needs to be tested and still may fail when the local time zone is different from the sensor time zone. That issue needs to be sill resolved.

[rosswhitaker]

Another problem. In the case of zero data, the api now returns "NaN" for the variance, which is an acceptable number in python, but not js. We need to decide how we want to handle this. Here is a thread that covers some of this: https://stackoverflow.com/questions/6601812/sending-nan-in-json/6602204

[JackWilb]

Running getEstimatesForLocation on the server now causes it to hit its memory limit. I'll open an issue to track resolving that.

[JackWilb]

Running getEstimatesForLocation on the server now causes it to hit its memory limit. I'll open an issue to track resolving that.

#43