Merge pull request #64 from deverett/master

Port Agent Client Integration and PortAgentPacket tests working.
adjusted IDK and base libs to align with port agent client changes
bump submodules
updated idk to align with new changes to the agent go active.
updated buildout so that it inherits the utility dependency from
pyon.
Finailization mostly complete
remove utility dependency, inherits from pyon
bump submodules
protocol_param_dict tests passing, JSON generating
Protocol Command Dictionary written and passes tests
Added driver dictionary
Cleaned up json vs dict generation, tied metadata config into driver and protocol
Merge pull request #65 from sfoley/schema_merge

Schema merge
updated so tests pass with new param dict
bump submodule
added new visibility, immutable
Merge pull request #66 from wfrench/master

Add new immutable visibility
added common method for reading parameters from a get
added expiration timestamps to paramerter values
updated instrument protocol to support getting expired parameters
Merge pull request #67 from wfrench/master

update sbe 54 so it uses new immutable parameter