Adak operations

This includes code that Simon or someone at Dartmouth maybe originally wrote and I may have added to it that creates the beam scanning array dynamically based on what values you give for -sb -eb and -cbm.  I've been running this at Fort Hays for the themisscan periods.  The biggest tweak here is the calculation of nintgs so that the scan doesn't run over the two minute scan boundary.  

Let me know if you'd rather prefer this go into the adak-dev branch.  I put it here originally in hopes that it would be in place for the November run and then you can run a larger field-of-view.