Conflicts:
	dream/simulation/Examples/DefaultAllInOneEmpty2.json
not sure of conflict resolution ...

+ add a TODO

full_schema: This seem to be the best syntax for conditional dependencies depending on property values in json schema

in draft4, dependency keyword only varies based on the presence or abscence of
a property.

This solution has been suggested in :

http://stackoverflow.com/questions/9029524/json-schema-specify-field-is-required-based-on-value-of-another-field
http://stackoverflow.com/questions/5036366/writing-more-complex-json-schemas-that-have-dependencies-upon-other-keys#answer-5112681

( type from v3 is oneOf from v4 )

fixup! Graph editor: remove node_id from node_id_to_dom_element_id when node is removed (from Ioannis)

Graph Editor: event handling promise where not in the tree of promise, so errors in those promise where silently ignored

Also fix the bug that data is not updated before beeing sent to simulation
server

- Source properties are missing
- General properties are missing