Gobs of updates and fixes

* Alex's image-processing improvements
  * Fix for last fiducial row
  * Scratch rejection (closes #163)
  * Sub-image searching
  * Dim-chord rejection
* Fixes to Alex's code, particularly with sub-image searching and sensor edges
* Camera-power relays are now turned on upon startup of the relay-control service
* Telemetry packet changes (closes #168)
  * Telemetry packets now need to be manually timestamped using the class method `setTimeAndFinish`
  * Telemetry packets sent by `sunDemo` now use the capture time as the timestamp
* Filenames have times in UT (part of #171)

Merging immediately