Add treebankPersister to sg conf
Activate notifier in sg conf
Save sg ancestor chain back to the xml
Extract sg in treebankRetriever
Conditionally add sg in treebankRetriever
Remove obsolete codepiece in sg
Fix minor bug in sg retrieval
Read in sg info from state on sg.init()
Merge pull request #206 from latin-language-toolkit/storing_sg_info

Storing and retrieving SG info