handshake implemented
handles nodedown message
added socket server and sup
able to connect on tcp
abstract added
handshake complete, added 4 states of workers
added layout for test run
create file test working
working on write file (compiling only)
open file working (right cases only)
handled some errors gracefully
sending data for writing completed, error not handled
receiveing message at worker node successfully
writing working with replication
document (pdf) updated
metadata server is updated with new chunk details
write working for large files
new tests added, working on report
modified readme