nco-3.1.9_1

I revised nco-3.1.9 to enable ncap2 variants back. <http://trac.macosforge.org/projects/macports/ticket/11611> Please review this fix and commit. BTW, the cause of the failure is case sensitivity (there are Ncap2.hh and ncap2.hh in the same directory). I moved ncap2.hh to ncap.hh and reinplace'd #include <ncap2.hh> then extracted Ncap2.hh. I wonder if there is a better way or standard solution. Thanks. Takeshi