WP 4869

The user environment has been changed to set up the awgstream environment properly.

The CERN ROOT package has been replaced with a version that supports python.

The gds software (diaggui, foton, etc) has been updated to gds-2.16.12.2, which has a number of bug fixes and a few enhancements:

* python scripting capability for awg and foton have been added.
* Cut/paste added to the Calibration dialog box in diaggui (and foton).
* Long channel names are no longer ignored in the Calibration dialog box.
* Fix bug preventing diaggui from reliably making continuous measurements.
* Unsigned 32 bit integer data support for diaggui time series.
* Foton legacy write option has been removed.
* Fix foton bugs for file path option, add "-o " option for non-gui file processing.
* Fix foton bug which caused crashes when invoked from diaggui.