determine online/offline status from local copy of close_node_changes
Merge branch 'MAID-477_use_local_copy_to_determine_online_offline_status' into MAID_363_test_updated_DataManager_Account

Conflicts:
	src/maidsafe/vault/data_manager/service.cc
	src/maidsafe/vault/data_manager/service.h
	src/maidsafe/vault/data_manager/value.cc
	src/maidsafe/vault/data_manager/value.h