Discovered breaking strings over two lines adds a newline :(
Now flushing after each print, since print! is ultimately buffered
Refactoring of rcopy.rs
Now actually respecting is_retryable in retry_exp
Removed redundant cast
First progress update is now the starting position, instead of 0
Now showing the transfer time for each file
Refactored rcopy.rs to be a little cleaner
A little more refactoring
use into_string() instead of to_string() for &str