Fail more clearly if given invalid input
Merge pull request #245 from CloCkWeRX/reject_invalid_log_arguments

Fail more clearly if given invalid input to logging subsystem
fix for issue #244
when an activity is modified, reset its lastTime counter
HTML5/D3: Automation subsystem now live for all.

Accessible via home page robot icon
Bug/Feature fixes:

 1. Finally fix changing level on a dimmable device.
 2. Resuse the level from the last time the device was turned on.
    (does not work between restarts of the Steward).
Really turn the switch off.

 If only setting the level to 0, it is still considered to be on.
Change the number of significant digts, as per discussion in #227.
Merge pull request #249 from torkelsson/telldus-weather

Change the number of significant digts, as per discussion in #227.
Merge pull request #248 from torkelsson/telldus-debug

Telldus dimmable devices
video/roku -> roku/video
first update since vacation

- hue: update code for nUPnP behavioral change
- better logging for plantlink code
use latest flower-power-cloud module
use new tesla supercharger location service
wednesday morning update

CO2 monitoring apprentice: look for any device with CO2

yoctopuce-hub: use async calls to get list of devices
cron parser check for DOTW
put FQDN in QRcode
advertise FQDN in TXT
ditto
more QRcode parameters!