creation of subentities model tree
Removing a debug line
Some refactos and polish code
Added connections among subentities
Update to the latest jLEMS and NeuroML
Merge branch 'development' of
https://github.com/openworm/org.geppetto.model.neuroml.git into
development

Conflicts:
	.project
Merge pull request #39 from openworm/development

Updating with latest from development
Remove NeuroML export from dev, it will be added in the
neuromlpopulation first and then merged from there.
Handling new NeuroML exception and update to cached NeuroML definitions
Attempo to fix travis build adding org.jvnet.jaxb2_commons
Some refactor and changes to adapt to new neuroml version
Update PopulateNeuroMLModelTreeUtils.java

Remove getType from all gates except the undetermined as it has been removed from the neuroml specification
Adding new dependencies
Merge with connection branch, updated to latest neuroml and lems
version, added org.neuroml.export bundle as dependency and fix some bugs
regarding connection nodes
Added Summary (infowriter information) to model tree
Parse connections properly
Removed network from main entity
Some refactor
Remove set of external builders references
Some bug fixing....about including the same file more than ones in
lemsprocessor
Fix in connections creation
Some more work on population
Merge remote-tracking branch 'origin/neuromlpopulation' into development
Set the IModelInterpreter and IModel for a subentity