Arima/initial

Initial implementation of ARIMA Time Series support, and a few helper BLAS and related attributes.
It may slow the roll up if a few records need to move nodes, but I suspect that the data will all be properly located to begin with.  I can use GROUP to force the records to move, but these are pretty small datasets at this point so I am inclined to leave alone for this version.  

When the data gets larger, I will need to use the BLAS libraries for the calculations.