YAML optimization

now uses sourceLoc to find the task signature, much much faster; <10ms

Also added support for relativeAOI for track: this will expands the aoi
from the matched signature to the whole AOI.
disabling log: in YAML

the info is redundant so I am disabling them
YAML: added support for unmatchLog and fixing a few thing

unmatchLog will log a message if the match fails. This is needed because
we need to know when the task was interrupted, e.g., by unrecognized
content.
unmatchedLog, relativeAOI, logging changes

supporting unmatchedLog for match: events
supporting relativeAOI for track: events
fixing logging format

Still struggling with the elusive error when it skips large changes
every so often -- see the track issue. Most likely this has to do with
the skimmingMode logic.
more consistent logging, and minor updates to YAML

YAML: now use CBALM.png, which is a copy of the original; just sounds
better

Logging is more consistent in format.
Added AOIDAT which is mostly \t-based, so that I can parse directly.
switching logs to INFO from DEBUG