Convert-VH version 1.11

        1.0 release, initial release;
        1.01 release, fixes VandH.pm to use Math::Complex - some V and H coordinates were coming out with negative square root errors, this fixes that.;
        1.10 release, Adds distance calculations. Results are in miles;
        1.11 release, fixes prereq_pm directive in Makefile.PL (closes: 16722)