gsync: Display additional information in status command

Added code to display extra information when status command
is executed.
 Information shown now are
1 Number of files synced
2 crawl time
3 total sync time
4 bytes synced

bytes synced is taken from rsync output .
--stats option of rsync gives extra infor
mation about the sync.In stats output there
is a field called Total transferred file
size which states the ammount of bytes synced .
This information is parsed from stdout output
using regular expressions.Bytes synced information
can be used to calculate throughput.

Change-Id: Id9bba9fff45ee7049bb8257c6fd918e5237e05b1
BUG: 947774
Signed-off-by: sarvotham s pai <spai@redhat.com>
Reviewed-on: http://review.gluster.org/4749
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Anand Avati <avati@redhat.com>