cleanup removeElement/removeElements methods
new method signature for util.removeElement(s)
added getPath function to AbstractConnector
added getPath implementation for flowchart connectors
callbacks to connection on edit lifecycle events
connector is not exposed on Connection anymore; use getConnector
tests for getPath function in flowchart connectors
update to cater for switch from exposed 'connector' member to getConnector() function on Connection
console output after connection edit
updates to changelog for Connection's connector changes