Merge remote-tracking branch 'origin/capturejob_processing_on_raspi' into rework_with_class_based_views
Reworked CaptureJobTemplates to be leaner and meaner.
Reworked species views/model/templates.  Also removed species deletion from UI.

Deleting a species deletes ALL RELATED OBJECTS.  In particular, all EXPERIMENTS,
CJRs and IMAGES are deleted.  Species deletion is henceforth to be done via the
admin interface which makes it clear what will be deleted.
Renamed a ton of stuff and deleted hopperchains.
Deleted hopperchain tests.
Working on raspi servers.
Nothing seems to have changed, so I'll commit to make this ghost delta go away.
Starting to add debug server capability to the imagery server.
Sample images for debug server.
Remove tunnel addressing for a direct connection.
Added PSU controls to Raspi unprivileged server.
Added return value to set_psu()
Unshadowed "payload" in thread function and some PEP8 corrections.
Merge branch 'raspberry_pi_servers' into combine_rework_with_raspi_servers
Changed ignore from secret_key.py to secret_keys.py.
Added current to the CJTs and to the views/telemetry requests.
Added current to the CJT template.
Modified CJRs to include current field.
Added current to "running job" status on experiment detail.
Added current to the last couple of required places on xp_detail template.