initial implementation of the new way to generate span relations without actually having them in the result set
modify import to not include unncessary token tuples
add (unoptimized) SQL to properly mark continuous spans and remove unecessary edges on import
always perform a left join on component and rank in case the are no rank entries for a node
delete unecessar span entries from rank earlier
correct code for finding unnecessary span entries
speeding up the import
don't set continuous colum to true for non-spans
updating the extraction sample to pcc v6
also implement creating missing spanning relations in AomAnnotateExtractor
remove rank entries for continuous spans on import (#317)