ENH: add a --no-dump option to disable dump_collection() if no timestamp is defined in oplog config
significantly reduce time processing unnecessarily large counts
ENH: --batch-size specifies how often to update the config file with position in oplog
bug fixes
Merge branch 'master' of https://github.com/adgaudio/mongo-connector into github_48

Conflicts:
	mongo_connector/connector.py
	mongo_connector/oplog_manager.py
github_48: fixed existing tests
added test for --no-dump option
added README documentation for --batch-size, --no-dump
Merge branch 'github_48'

Conflicts:
	mongo_connector/connector.py