add python script to sync local to global; it creates one thread per graph as needed and it uploads the changes file to global based on the last sync sequence
add suport for handling last sync sequence; it is stored into ERS_graphs keyspace and based on this the local synchronized the differences since then; all changes are received on a text file and bulkrun servlet process it
Merge branch 'develop' of https://github.com/ers-devs/ers into global_server