made the use of GSParams by the ODD and Interval const, and passed the gsparams into the SBExponentialInfo class to use for building its lookup table
(#325)
fixed the gsparams to be the final, optional input in the Interpolant derived classes
(#325)
fixed the gsparams to be the final, optional input in the Interval and ODD classes
(#325)
minor whitespace edit
(#325)
reflected change in gsparams order in calls to Interval within ODD
(#325)