add sampleID to the _events.txt

as the content of the saccade
trying to export all gaze data

The original algorithm exports only gaze samples on items with AOI
definitions. Trying to export all, and to improve the coding.

- now visualize differently templates for matching/tracking from AOIs;
gazes on templates are not exported anymore.
- adding "page" info in the gazes on an item page but not on an AOI.
- also exporting gaze on non-item pages as JUNKSCREEN

- this version does NOT fix the problem of not exporting gazes during
skimmed screens. I will fix that in the next version.
exporting the sample number as "info"
No more OCR of question numbers

as we can easily track with templateMatching. This speeds up a little
bit.