abstract timeseries model; modelregistry v1
First attempt at NetworkSensor arduino library.
written with std::map, which is unsupported...
char* bug fix in NetworkSensor. SD still corrupting..
fixed string buffer when splicing write. also added some delays.
cleaning up NetworkSensor. TODO use multiple files
TimeNTP class written; not syncing for reasons unknown
NTP handled by the NetworkSensor class itself. Still no sync, but very close!
no more SD. Uses TimestampValueArray. Sort of working.
NetworkSensor now accepts an epoch time set
Merge branch 'master' into arduino
Merge branch 'app-restructure' into arduino
fully functional NetworkSensor
fixed parsing time from url
NetworkSensor keeps time in seconds rather than milliseconds (no overflow with epoch times)

Time-setting (appears) fully functional!
added NetworkDHT.ino as an example
serious amounts of comments in NetworkDHT
Merge branch 'arduino' into app-restructure
arduino moved to a server app
added status field to ModelRegistry