update changelog
- Missing visitor for SubstitutedVMEvent
- JSON serialization for SubstitutedVMEvent
- Interface to propagate committed events when applying a plan
doc
Decompose Action.apply() for a future finer event propagation system
Test Action propagation
Test event propagation
Fix an uncomplete visit() in SubstitutedVMEvent.
start externalize action insertion from ChocoModelViews
migration to java7
Code cleaning
jdk7
fix conflict
fix resource allocation dilemma when relying on re-instantiated VM.

Nasty fix but it does the job for the moment.