Added new nodetype (script) with necessary functionality to edit and display it in the viewer
There are still bugs in the nodetype (i.e. it is not usable), but fixing them will require changes in the node logic
Merge branch 'master' of https://github.com/joschabach/micropsi2 into nodenet_refactoring
Reinstantiated node.activation to its former glory
Moved test for existence of world from general node function to the node function of the Actor
Requesting activation from a node no longer computes that activation (side effect)
Default node function calculates activation from slots, and calls gate functions with node activation
Setting node activation to gen
As node.activation is no longer a function of gate
activations, redraw checking has to be performed
on gate activation to catch all redraw conditions
Finished node function for script node
Merge branch 'nodenet_refactoring' of https://github.com/joschabach/micropsi2 into nodenet_refactoring
Merge branch 'master' into nodenet_refactoring

Conflicts:
	micropsi_core/nodenet/nodefunctions.py
	micropsi_server/static/js/nodenet.js
	micropsi_server/view/nodenet.tpl
fix tests
Merge remote-tracking branch 'joscha/master' into nodenet_refactoring

Conflicts:
	micropsi_core/nodenet/nodefunctions.py
Merge pull request #10 from joschabach/nodenet_refactoring

Script Nodes, Nodenet refactoring
don't display link_uids in node_form.

plus, fix the weird incoming link disply logic
Actor logic fix.
Implementing node_field net api addition for
querying linked nodes
For elegance, reference nodes by object, not by ID
Fix for querying datatargets
Introducing ling_actor for convenient actor
linking
Introducing link_sensor for convenient sensor
linking
Importer nodes for convenient access to full
world adapter functionality
Introducing get_active for easy querying of active
nodes above a given threshold