Fixed NullPointerException in the first run of the job when the lastSeedVersion is NULL and there is no information about last transactions. Fixed by sending lastTransactionId=0 and lastAclChangesetId=0 in the first run.

Include a new Service in the Alfresco Client to get the binary content of the documents
Merge pull request #16 from rafaharo/master

Fixed NullPointerException in the first run of the job when the last ACL/TXN are null.