Force NTP update script to prevent Session timeout
Handle errors when grabbing the browser screenshot

pytest internal errors were being caused in cases where either the
browser was closed when we tried to grab the screenshot, or otherwise
it was invalid (UnexpectedAlertException, for example). pytest internal
errors are bad, so this prevents them from occurring.
Merge pull request #337 from mfalesni/clock_set

Force NTP update script to prevent Session timeout
two script tweaks

change appliance_logs filename artifact
chmod +x ntp_clock_set.py
Merge pull request #343 from dajohnso/script_tweaks

two script tweaks
Merge pull request #344 from seandst/browsershot-errors

Handle errors when grabbing the browser screenshot
Reorganised docs and amended some content
Start of new documentation