creation of subentities model tree
Add validation for node values
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
Add fix in order to avoid js error compilation error
fixed textmetadata node
Added option to expand node from the beginning
Added prototype to add color according to the node type
Added name to visualobjectreferencenode constructor
Implemented visualobjectreferencenode for treevisualiserdat
Merge remote-tracking branch 'origin/neuromlpopulation' into connection