signal_filter.py: fixed buggy `insert_scores()`.

Simply delete any scores that we're about to insert. This
is affectively and update. This has revealed another problem;
relative score isn't computed properly.
Merge branch 'schema_update' of https://github.com/qraat/qraat into schema_update
rmg_position_auto: only process scored pulses.

A previous commit comment about the computation of relscore
should be disregarded. (See comments on CONFIG_DELTA_AWAY
in signal_filter.py.)
rmg_position_auto: Fixed incorrect column name.
Cleaning up output of signal filter.
Supress 'Update Cursor ... ' output
A little commenting.
Working out bugs in automated procesing ...
Cleanup up output, bug fix in curosr update.
Cleaning log outputs.
Merge branch 'schema_update' of https://github.com/qraat/qraat into schema_update
Merge branch 'master' into schema_update
Merge branch 'master' into schema_update
Merge branch 'schema_update' into sean_time_filter