[change] common
	[add] new ConnectionKeys used by ConnectionsReaderWriter or json
	[change] removeProterty method name
	
[change] dataservice
	[add] ConnectionsReaderWriter saved connections in property
	[change] used new ConnectionKeys
	[change] add new connection flags (statup.dump, startup.connect, ....
	[change] db path [neo4j.db.path]/connection/[connectionName]
	[change] update Rest-resources
	![change]! rest-path for saving, no connectionName in path, name
specified in the json object
	
[change] visualization
	[change] used new ConnectionKeys
	[fix] tab name is rest name
	[change] add new tree Nodes methods for connection