skipping the video to the first valid gaze

if gaze data is present, then skip to the first gaze time stamp
correct for toffset when skipping video based on gaze time
eyelink awk major update

- use the first column as the timestamp
- added gettime() function to convert date/time into msec
- generate a serial num for gaze data
automatically skip to the video frame of first gaze data

this is necessary for the eyelink videos, where there can be minutes of
calibration screens; they change a lot and takes a long time to process.
Now we can jump right to the assessment part.
fix again
eyelink gaze-video lag estimated at -1300

using trial and error
break is not implemented correctly; disabling

break is never implemented correctly. At this point it simply returns
False to the iteration, which terminates the YAML processing **before**
reaching to the children of the current node. The intent is to
**finish** processing the children and **stop** processing siblings.
Until I get this right, let's disable the directive.