Added code for heartbeat from port agent, as well as code to handle
other types of packets.
Merge remote-tracking branch 'upstream/master'
Added got_data_raw to protocol; added code to accept callback_raw and
callback_error, and heartbeat parameters.
Merge remote-tracking branch 'upstream/master'

Conflicts:
	mi/core/instrument/port_agent_client.py
Added test_handle_packet; added parameter for packet type for testing,
moved packet types to within PortAgentPacket class.
Added test for heartbeat_timeout
incrimental changes to presf
updated test driver and removed -b? options.  The code has been
modified so the -q -u -i modifiers apply for -b tests.  Added a
new test class for testing publications and a new test option -p.
Added code to set the port_agent's heartbeat, and associated tests.
Added connection-level recovery.  We might move this up into the driver
base class, but for now it works.  (Tested with real PortAgent.)
Merge remote-tracking branch 'upstream/master'
Merge remote-tracking branch 'upstream/master'
added new tools for testing TCP connections
moved tcp simulator
incremental commit, pre bump to submodules
bumped submodules to latest greatest
publishing test framework in place.  Need preload to work and then
need to validate granules
Added return code for send method; changed to/added references to callback_raw
where needed.
Embellished a comment.
Modified code to use new callback_raw.  Eventually these tests should be
changed to use base class particle tests.