Arima/initial

Initial implementation of ARIMA Time Series support, and a few helper BLAS and related attributes.
I think it is correct, but perhaps not wise.  There will be few model ID values.  I think that the above code will leave one record for each model ID, which will have the effect of leaving a node with either 0 or 1 records because there are few model identifiers.  I'll think on this some more.