Fix instrument agent test yet again
Merge branch 'master' of github.com:ooici/coi-services
Merge pull request #855 from shenrie/master

Fix instrument agent test yet again
Add driver shutdown on quit.
Fix driver shutdown on quit.
remove now unneeded debugging methods in the int tests
Release Version 2.0.18
Bump Version to 2.0.19-dev
Adds reference attachment support (with test)
Adds cleanup to test and bumps submodule references
Merge pull request #856 from lukecampbell/attachments

Attachment Reference Support
Updates test, support for multiple attachments
Merge pull request #857 from lukecampbell/attachments

Updates test, support for multiple attachments
Refine restore state logic.
add entry for simulator instance running on port 4008 (which I somehow missed
 to include after Roger's email)
Updates ion_loader's parser for lookup_value column
Merge pull request #860 from lukecampbell/ion_loader

Updates ion_loader's parser for lookup_value column
preparations for publications and subscription of device status and device
aggregate status events as indicated by Maurice -- still incomplete.
some refactoring in platform integration test to facilitate further tests,
in particular there is a new test_platform_instrument intended to exercise
some more detailed tests against the instrument launched by the platform.
merge upstream/master