added code for live machine verification
Merge pull request #1 from vachiwome/master

added code for live machine verification
put back code for exception handling
revert to stage 1
modified liveliness tests
better test
better test
better test
better test
test conenction
test conenction
test conenction
test conenction
fixed the issue with dead servers
house keeper running
subopt
subopt
subopt
reverted the housekeeping code and non blocking receive
reverted the housekeeping code and non blocking receive