works with Fedora 19, don't restart services unnecessarily
add --incompressible
add --incompressible, make logic for choosing next transfer size more consistent
add --record-ctime-size option to support async replication testing
new await-create operation supports async. replication testing
avoid floating-pt numbers in python3
explain how to test asynchronous replication/copy
avoid floating-pt division in python3, don't try await-create test with python3 which has no xattrs