91/09/24 - JR - rotate.c:
                Modified to use ancillary_1.mn_heading for
                heading-related rotation if available (nonzero), else
                ancillary_2.last_heading
91/12/05 - JR - rotate.c:
		Added time-related rotation for cases where transducer
		misalignment varies over time; control file has new
		rotate options:  time_0, angle_1, angle_2, angle_3,
		and year_base.  The transducer misalignment angle is
		calculated as:

		   angle_0 + angle_1 * t + angle_2 * (t ^ 2) +
		   angle_3 * (t ^ 3) + angle_sin_H * sin(heading) +
		   angle_cos_H * cos(heading)

                where t = profile time - time_0
		in decimal days for the year year_base.  The time_0
		is usually the middle point of the time range for
		which the equation is applicable.
92/08/14 - JR - rotate.c:
                Fixed major bug introduced in above modification
		(91/12/05) affecting heading-related rotation:     
		failed to convert ship heading from degrees to radians
		prior to applying sine/cosine, resulting in 
		miscalculation of the transducer misalignment angle.
95/04/30 - EF - refabs.c:
                Fixed initialization bug found by Erik Gottlieb in          
                refabsbt, which caused the first refabsbt (and probably       
                first refabs, though no example was found) velocity           
                values (second line in refabsbt output) to be incorrect. 
95/05/30 - EF - arrdep.c:
                Increased NRMAX from 21 to 1001 and added error
                checking to prevent n_refs from exceeding this
                and causing a segmentation fault.
95/10/30 - EF - adcp_cal.bat:
                added compilation of arrdep and timslip.
