Removing active node tracking to simplify things, 
also suspecting this is not improving performance
for small to medium sized node nets.
Redefining step logic for RUN-10.
Activation now defined as sum of gates, not slots.
Removing activated nodes tracking for now.
Gate activation is now transferred to the client
and used to color gates and links.
Now displays gate activation
Fixing activator and actor node functions.
Activation setting now works for activators.
Failed before as they, famously, don't have any
gates.
Less confusing handling of missing gates: Deal
with the special case instead of inventing
phantom gates.
Back to correct activator treatment.
And a missing report for consistent UI states.
set/get activation via data in property-functions

this fixes setting the activation of activators.
set actor activation in nodefunction

otherwise, the frontend does not see the state of the activator
remove commented code.
Merge pull request #7 from Doik/feature-newsteplogic

Thanks.
Contain random sensor activation
TOL-9 #fixed redraw links instead of adding

plus, increase defences if link did not exist before
refresh nodespacelist on node rename
TOL-9 fixup: redraw doesn't add link to link hash
make activators optional
Merge remote-tracking branch 'joscha/master' into feature-newsteplogic