Iterative checkin; prior includes fix for recovery; this includes the start
of a parameter to/not to start listener thread.
Added code to test lost connection recovery in send context.
Merge remote-tracking branch 'upstream/master'
Merge pull request #63 from deverett/master

Submitting code to raise exception when connection lost (a missed case).
bump submodules
update triple creation to stringify values
updated exception to include exception type in the message
remove data from the driver because most instruments echo
Merge remote-tracking branch 'upstream/master'
use constants for timeout definitions
fixed timeout issues and broken tests.
added tests to verify discover