Arima/initial

Initial implementation of ARIMA Time Series support, and a few helper BLAS and related attributes.
Data for a model always fitting on a node is something I am thinking about.  This is built to require that the observations fit on a node.

My training and experiences with time series modeling tell me that a few thousand observations is way bigger than what would be acceptable.  However, my view is 70's centric, so I am examining my assumptions.