Add HTTP POST update function, simple binary parser, RockBLOCK support

Adds a simple HTTP POST update function that may be used by just about anything to insert telemetry with a really easy HTTP POST instead of requiring any real interaction with CouchDB. The function also has special-casing for RockBLOCKs to perform some useful functions.

Adds a simple binary parser. No checksums and callsigns must be provided out of band, just unpacks binary data according to field specifications.

Taken together, this adds easy RockBLOCK support.