added get_unit and test
add get data for dds response

add get data for dds response
fixed the platform agent attribute of platform device extension
Fixed extended_platform.platform_agent attribute. Fixed tests
Method stubs for data subs
Buildout 2.0
OOIION-741: simplify get_context() lookup
Merge pull request #729 from ifreecarve/2013-03-19_simplify_get_context

OOIION-741: simplify get_context() lookup
Bump egg number.
Merge branch 'master' of github.com:ooici/coi-services
Add lost connection tests to nightly.
Adds data subscription capabilities
Updates ion-defs
Cleans up tests and fixes subscription bug
Show picked versions
Update README on buildout 2.0
Merge pull request #720 from swarbhanu/ooiion-745

Addresses Ooiion 745 (Instrument and platform extended resource "agent" attribute sending back more than associated agent)
Merge pull request #731 from jamie-cyber1/refactor_buildout

buildout 2.0
Fixed issue OOIION-775 extended resource lifecycle transitions
Still working on cleanup for pubsub