Initial sorting of changes for Nortek
First partial pass on nortek driver
Working on initial split into parent class
Data particles defined for responses to commands and configs
Added scheduled stuff, cleaned up more. Still problems with param loads and metadata tests.
Cleaned up metadata string dev access, added metadata strings to Nortek drivers
Cleaned up and all int tests passing
All tests passing for VEL3D-CD driver
Removed recorder commands
Merge pull request #106 from sfoley/master

Finalizing VEL3D-CD driver, improved InstrumentDict classes and metadata, cleaned up some odds and ends