add test for checking 3 servers
add initial replication
Merge branch 'master' of https://github.com/rreas/cse223b into replication
test node failure
merge
WIP: add thrift for getting replicas
finish test to check replicate on successor. all tests pass except joining_copies_data, crash_some_servers
refactor tests
add failed_node as arg to handle_successor_failure
WIP add move_backup thrift RPC
test_crash_some_servers passing
Change sleep length for experiment #1.
Minor changes to experiment.