Copy files

[bbfsdev]

I see you handled all the things we talked about + moved the tcp call outside. Good work, please merge the changes.

[yarondbb]

I have enhanced the design so it will use a queue for copy on demend (as you wanted). This is probalby the fastest way to handle it. Pls review the new code. Also I have changed the way backup is checking if file already exists - instead of checking the dynamic content data it is now chaking the actuall destination of the file (so we are not dependent on cycles of monitoring which might be slow)

[yarondbb]

@kolmanv pls review again