SAX code and TrajectoryDB schema evolution

In order to improve the indexing speed and move towards automatic motif discovery I've updated DB schema making it more motif-centric and customized SAX code data structures allowing automatic motif frequency computation.

Due to the fair amount of failing data retrievals from sensorbase I've decided to create a local chart index and rewrite the telemetry data retrieval code.

Current db schema:


As you can see the sax_motif table is the top-level summary of found motifs. It should be easy to count and sort by the frequency and see DISTINCT projects where the particular motif occurs. Just need to write a code and populate the data now.